87975257978 has 8 divisors (see below), whose sum is σ = 133130700468. Its totient is φ = 43598357824.

The previous prime is 87975257911. The next prime is 87975257983.

87975257978 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 78555196729 + 9420061249 = 280277^2 + 97057^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194635301 + ... + 194635752.

Almost surely, 2^87975257978 is an apocalyptic number.

87975257978 is a deficient number, since it is larger than the sum of its proper divisors (45155442490).

87975257978 is a wasteful number, since it uses less digits than its factorization.

87975257978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389271168.

The product of its digits is 622339200, while the sum is 74.

The spelling of 87975257978 in words is "eighty-seven billion, nine hundred seventy-five million, two hundred fifty-seven thousand, nine hundred seventy-eight".