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687061668173 = 11031264749253
BaseRepresentation
bin10011111111110000001…
…00010001000101001101
32102200102111202001002212
421333320010101011031
542224100241340143
61243344244000205
7100432012551326
oct11777004210515
92380374661085
10687061668173
11245421444481
12b11a7690065
134ca35aaa5aa
142537ac2d44d
1512d13287918
hex9ff811114d

687061668173 has 8 divisors (see below), whose sum is σ = 687752909568. Its totient is φ = 686370552784.

The previous prime is 687061668149. The next prime is 687061668179. The reversal of 687061668173 is 371866160786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 687061668173 - 28 = 687061667917 is a prime.

It is a super-2 number, since 2×6870616681732 (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687061668179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13925015 + ... + 13974267.

It is an arithmetic number, because the mean of its divisors is an integer number (85969113696).

Almost surely, 2687061668173 is an apocalyptic number.

It is an amenable number.

687061668173 is a deficient number, since it is larger than the sum of its proper divisors (691241395).

687061668173 is a wasteful number, since it uses less digits than its factorization.

687061668173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63003.

The product of its (nonzero) digits is 12192768, while the sum is 59.

The spelling of 687061668173 in words is "six hundred eighty-seven billion, sixty-one million, six hundred sixty-eight thousand, one hundred seventy-three".

Divisors: 1 1103 12647 49253 13949641 54326059 622902691 687061668173