78617355460 has 24 divisors (see below), whose sum is σ = 188681653440. Its totient is φ = 26954521824.

The previous prime is 78617355449. The next prime is 78617355473. The reversal of 78617355460 is 6455371687.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 78617355398 and 78617355407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280776130 + ... + 280776409.

It is an arithmetic number, because the mean of its divisors is an integer number (7861735560).

Almost surely, 2^78617355460 is an apocalyptic number.

78617355460 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78617355460 is an abundant number, since it is smaller than the sum of its proper divisors (110064297980).

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

78617355460 is a wasteful number, since it uses less digits than its factorization.

78617355460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561552555 (or 561552553 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 52.

The spelling of 78617355460 in words is "seventy-eight billion, six hundred seventeen million, three hundred fifty-five thousand, four hundred sixty".