78427804892 has 24 divisors (see below), whose sum is σ = 137875920336. Its totient is φ = 39034892288.

The previous prime is 78427804891. The next prime is 78427804901. The reversal of 78427804892 is 29840872487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78427804891) 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, 1540598 + ... + 1590690.

It is an arithmetic number, because the mean of its divisors is an integer number (5744830014).

Almost surely, 2^78427804892 is an apocalyptic number.

It is an amenable number.

78427804892 is a deficient number, since it is larger than the sum of its proper divisors (59448115444).

78427804892 is a wasteful number, since it uses less digits than its factorization.

78427804892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51877 (or 51875 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 59.

The spelling of 78427804892 in words is "seventy-eight billion, four hundred twenty-seven million, eight hundred four thousand, eight hundred ninety-two".