8972255563978 has 16 divisors (see below), whose sum is σ = 15877171137024. Its totient is φ = 3721211984880.

The previous prime is 8972255563967. The next prime is 8972255564017. The reversal of 8972255563978 is 8793655522798.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10336699525 + ... + 10336700392.

It is an arithmetic number, because the mean of its divisors is an integer number (992323196064).

Almost surely, 2^{8972255563978} is an apocalyptic number.

8972255563978 is a deficient number, since it is larger than the sum of its proper divisors (6904915573046).

8972255563978 is a wasteful number, since it uses less digits than its factorization.

8972255563978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20673399957.

The product of its digits is 2286144000, while the sum is 76.

The spelling of 8972255563978 in words is "eight trillion, nine hundred seventy-two billion, two hundred fifty-five million, five hundred sixty-three thousand, nine hundred seventy-eight".