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208885157407 = 1997113339749
BaseRepresentation
bin1100001010001010000…
…1101000111000011111
3201222011120021110002101
43002202201220320133
511410244100014112
6235543245505531
721043240354003
oct3024241507037
9658146243071
10208885157407
11806512534a3
12345972722a7
131690c05cb74
14a178160703
155678518757
hex30a2868e1f

208885157407 has 8 divisors (see below), whose sum is σ = 222145910000. Its totient is φ = 195851084544.

The previous prime is 208885157381. The next prime is 208885157461. The reversal of 208885157407 is 704751588802.

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 208885157407 - 211 = 208885155359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208885151407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56668032 + ... + 56671717.

It is an arithmetic number, because the mean of its divisors is an integer number (27768238750).

Almost surely, 2208885157407 is an apocalyptic number.

208885157407 is a deficient number, since it is larger than the sum of its proper divisors (13260752593).

208885157407 is a wasteful number, since it uses less digits than its factorization.

208885157407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113339865.

The product of its (nonzero) digits is 5017600, while the sum is 55.

The spelling of 208885157407 in words is "two hundred eight billion, eight hundred eighty-five million, one hundred fifty-seven thousand, four hundred seven".

Divisors: 1 19 97 1843 113339749 2153455231 10993955653 208885157407