7954892978 has 6 divisors (see below), whose sum is σ = 11932528671. Its totient is φ = 3977383422.

The previous prime is 7954892951. The next prime is 7954892983. The reversal of 7954892978 is 8792984597.

It can be written as a sum of positive squares in only one way, i.e., 3977446489 + 3977446489 = 63067^2 + 63067^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=63067.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 94601 + ... + 157667.

Almost surely, 2^7954892978 is an apocalyptic number.

7954892978 is a deficient number, since it is larger than the sum of its proper divisors (3977635693).

7954892978 is an frugal number, since it uses more digits than its factorization.

7954892978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126136 (or 63069 counting only the distinct ones).

The product of its digits is 91445760, while the sum is 68.

The square root of 7954892978 is about 89190.2067381840. The cubic root of 7954892978 is about 1996.2339945525.

The spelling of 7954892978 in words is "seven billion, nine hundred fifty-four million, eight hundred ninety-two thousand, nine hundred seventy-eight".