7942504977 has 30 divisors (see below), whose sum is σ = 13041413154. Its totient is φ = 4813633440.

The previous prime is 7942504961. The next prime is 7942504987. The reversal of 7942504977 is 7794052497.

7942504977 is a `hidden beast` number, since 7 + 9 + 42 + 504 + 97 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4064827536 + 3877677441 = 63756^2 + 62271^2 .

It is not a de Polignac number, because 7942504977 - 2⁴ = 7942504961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7942504987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 395388 + ... + 414989.

Almost surely, 2^7942504977 is an apocalyptic number.

It is an amenable number.

7942504977 is a deficient number, since it is larger than the sum of its proper divisors (5098908177).

7942504977 is a wasteful number, since it uses less digits than its factorization.

7942504977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810411 (or 810391 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 54.

The square root of 7942504977 is about 89120.7325878777. The cubic root of 7942504977 is about 1995.1972239866.

The spelling of 7942504977 in words is "seven billion, nine hundred forty-two million, five hundred four thousand, nine hundred seventy-seven".