78546464587 has 4 divisors (see below), whose sum is σ = 78650225536. Its totient is φ = 78442703640.

The previous prime is 78546464501. The next prime is 78546464593.

78546464587 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78546464587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78546464687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51879339 + ... + 51880852.

It is an arithmetic number, because the mean of its divisors is an integer number (19662556384).

Almost surely, 2^78546464587 is an apocalyptic number.

78546464587 is a deficient number, since it is larger than the sum of its proper divisors (103760949).

78546464587 is a wasteful number, since it uses less digits than its factorization.

78546464587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103760948.

The product of its digits is 180633600, while the sum is 64.

The spelling of 78546464587 in words is "seventy-eight billion, five hundred forty-six million, four hundred sixty-four thousand, five hundred eighty-seven".