87936655663978 has 16 divisors (see below), whose sum is σ = 143910315165600. Its totient is φ = 39967326694000.

The previous prime is 87936655663951. The next prime is 87936655663979.

87936655663978 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (87936655663979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193789528 + ... + 194242771.

It is an arithmetic number, because the mean of its divisors is an integer number (8994394697850).

Almost surely, 2^{87936655663978} is an apocalyptic number.

87936655663978 is a deficient number, since it is larger than the sum of its proper divisors (55973659501622).

87936655663978 is a wasteful number, since it uses less digits than its factorization.

87936655663978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388042613.

The product of its digits is 74071065600, while the sum is 88.

The spelling of 87936655663978 in words is "eighty-seven trillion, nine hundred thirty-six billion, six hundred fifty-five million, six hundred sixty-three thousand, nine hundred seventy-eight".