78560479657 has 16 divisors (see below), whose sum is σ = 87789506112. Its totient is φ = 69682878720.

The previous prime is 78560479637. The next prime is 78560479663. The reversal of 78560479657 is 75697406587.

It is a cyclic number.

It is not a de Polignac number, because 78560479657 - 2¹¹ = 78560477609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78560479637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354573 + ... + 531829.

It is an arithmetic number, because the mean of its divisors is an integer number (5486844132).

Almost surely, 2^78560479657 is an apocalyptic number.

It is an amenable number.

78560479657 is a deficient number, since it is larger than the sum of its proper divisors (9229026455).

78560479657 is a wasteful number, since it uses less digits than its factorization.

78560479657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178248.

The product of its (nonzero) digits is 88905600, while the sum is 64.

The spelling of 78560479657 in words is "seventy-eight billion, five hundred sixty million, four hundred seventy-nine thousand, six hundred fifty-seven".