87902211220978 has 64 divisors (see below), whose sum is σ = 164639324528640. Its totient is φ = 34195406731200.

The previous prime is 87902211220877. The next prime is 87902211221003.

87902211220978 is nontrivially palindromic in base 10.

87902211220978 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×87902211220978² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 291729163 + ... + 292030321.

It is an arithmetic number, because the mean of its divisors is an integer number (2572489445760).

Almost surely, 2^{87902211220978} is an apocalyptic number.

87902211220978 is a deficient number, since it is larger than the sum of its proper divisors (76737113307662).

87902211220978 is a wasteful number, since it uses less digits than its factorization.

87902211220978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304063.

The product of its (nonzero) digits is 4064256, while the sum is 58.

The spelling of 87902211220978 in words is "eighty-seven trillion, nine hundred two billion, two hundred eleven million, two hundred twenty thousand, nine hundred seventy-eight".