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78157072967 = 197649161121
BaseRepresentation
bin100100011001010000…
…1100100101001000111
321110201220022200101012
41020302201210221013
52240031202313332
655523241152435
75434543105331
oct1106241445107
9243656280335
1078157072967
11301676a2796
121319278b71b
1374a7394b4c
143ad60ca451
1520767d63b2
hex1232864a47

78157072967 has 8 divisors (see below), whose sum is σ = 78567196752. Its totient is φ = 77747084800.

The previous prime is 78157072963. The next prime is 78157072991. The reversal of 78157072967 is 76927075187.

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 78157072967 - 22 = 78157072963 is a prime.

It is a super-2 number, since 2×781570729672 (a number of 23 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 (78157072963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1248167 + ... + 1309287.

It is an arithmetic number, because the mean of its divisors is an integer number (9820899594).

Almost surely, 278157072967 is an apocalyptic number.

78157072967 is a deficient number, since it is larger than the sum of its proper divisors (410123785).

78157072967 is a wasteful number, since it uses less digits than its factorization.

78157072967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67809.

The product of its (nonzero) digits is 10372320, while the sum is 59.

The spelling of 78157072967 in words is "seventy-eight billion, one hundred fifty-seven million, seventy-two thousand, nine hundred sixty-seven".

Divisors: 1 197 6491 61121 1278727 12040837 396736411 78157072967