7971901904 has 10 divisors (see below), whose sum is σ = 15445559970. Its totient is φ = 3985950944.

The previous prime is 7971901891. The next prime is 7971901957. The reversal of 7971901904 is 4091091797.

It can be written as a sum of positive squares in only one way, i.e., 6294835600 + 1677066304 = 79340^2 + 40952^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249121919 + ... + 249121950.

It is an arithmetic number, because the mean of its divisors is an integer number (1544555997).

Almost surely, 2^7971901904 is an apocalyptic number.

It is an amenable number.

7971901904 is a deficient number, since it is larger than the sum of its proper divisors (7473658066).

7971901904 is a wasteful number, since it uses less digits than its factorization.

7971901904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498243877 (or 498243871 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 47.

The square root of 7971901904 is about 89285.5078050184. The cubic root of 7971901904 is about 1997.6557453085.

The spelling of 7971901904 in words is "seven billion, nine hundred seventy-one million, nine hundred one thousand, nine hundred four".