7973700978 has 16 divisors (see below), whose sum is σ = 16885484640. Its totient is φ = 2501553216.

The previous prime is 7973700953. The next prime is 7973700997. The reversal of 7973700978 is 8790073797.

It is a Curzon number.

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, 39086668 + ... + 39086871.

It is an arithmetic number, because the mean of its divisors is an integer number (1055342790).

Almost surely, 2^7973700978 is an apocalyptic number.

7973700978 is an abundant number, since it is smaller than the sum of its proper divisors (8911783662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7973700978 is a wasteful number, since it uses less digits than its factorization.

7973700978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78173561.

The product of its (nonzero) digits is 4667544, while the sum is 57.

The square root of 7973700978 is about 89295.5820743669. The cubic root of 7973700978 is about 1997.8060089150.

The spelling of 7973700978 in words is "seven billion, nine hundred seventy-three million, seven hundred thousand, nine hundred seventy-eight".