78055388892 has 72 divisors (see below), whose sum is σ = 212553242720. Its totient is φ = 24009229440.

The previous prime is 78055388833. The next prime is 78055388899. The reversal of 78055388892 is 29888355087.

78055388892 is a `hidden beast` number, since 7 + 8 + 0 + 5 + 538 + 8 + 8 + 92 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78055388899) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1505334 + ... + 1556322.

Almost surely, 2^78055388892 is an apocalyptic number.

It is an amenable number.

78055388892 is an abundant number, since it is smaller than the sum of its proper divisors (134497853828).

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

78055388892 is a wasteful number, since it uses less digits than its factorization.

78055388892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54283 (or 54278 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 63.

The spelling of 78055388892 in words is "seventy-eight billion, fifty-five million, three hundred eighty-eight thousand, eight hundred ninety-two".