78929879040 has 672 divisors, whose sum is σ = 294422169600. Its totient is φ = 19499581440.

The previous prime is 78929878961. The next prime is 78929879087. The reversal of 78929879040 is 4097892987.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 413245345 + ... + 413245535.

Almost surely, 2^78929879040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78929879040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147211084800).

78929879040 is an abundant number, since it is smaller than the sum of its proper divisors (215492290560).

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

78929879040 is a wasteful number, since it uses less digits than its factorization.

78929879040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 78929879040 in words is "seventy-eight billion, nine hundred twenty-nine million, eight hundred seventy-nine thousand, forty".