78554645587 has 12 divisors (see below), whose sum is σ = 86477504400. Its totient is φ = 71303880560.

The previous prime is 78554645581. The next prime is 78554645621.

78554645587 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78554645587 - 2¹¹ = 78554643539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78554645581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 418087 + ... + 576112.

It is an arithmetic number, because the mean of its divisors is an integer number (7206458700).

Almost surely, 2^78554645587 is an apocalyptic number.

78554645587 is a deficient number, since it is larger than the sum of its proper divisors (7922858813).

78554645587 is a wasteful number, since it uses less digits than its factorization.

78554645587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994874 (or 994863 counting only the distinct ones).

The product of its digits is 188160000, while the sum is 64.

The spelling of 78554645587 in words is "seventy-eight billion, five hundred fifty-four million, six hundred forty-five thousand, five hundred eighty-seven".