56087647978 has 4 divisors (see below), whose sum is σ = 84131471970. Its totient is φ = 28043823988.

The previous prime is 56087647963. The next prime is 56087647991. The reversal of 56087647978 is 87974678065.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 30834306409 + 25253341569 = 175597^2 + 158913^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14021911993 + ... + 14021911996.

Almost surely, 2^56087647978 is an apocalyptic number.

56087647978 is a deficient number, since it is larger than the sum of its proper divisors (28043823992).

56087647978 is a wasteful number, since it uses less digits than its factorization.

56087647978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28043823991.

The product of its (nonzero) digits is 142248960, while the sum is 67.

The spelling of 56087647978 in words is "fifty-six billion, eighty-seven million, six hundred forty-seven thousand, nine hundred seventy-eight".