78835658680 has 32 divisors (see below), whose sum is σ = 181154283840. Its totient is φ = 30863320960.

The previous prime is 78835658669. The next prime is 78835658683. The reversal of 78835658680 is 8685653887.

It is a super-2 number, since 2×78835658680² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78835658683) 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, 20965051 + ... + 20968810.

It is an arithmetic number, because the mean of its divisors is an integer number (5661071370).

Almost surely, 2^78835658680 is an apocalyptic number.

It is an amenable number.

78835658680 is an abundant number, since it is smaller than the sum of its proper divisors (102318625160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78835658680 is a wasteful number, since it uses less digits than its factorization.

78835658680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41933919 (or 41933915 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 64.

The spelling of 78835658680 in words is "seventy-eight billion, eight hundred thirty-five million, six hundred fifty-eight thousand, six hundred eighty".