6391275372 has 36 divisors (see below), whose sum is σ = 16215806880. Its totient is φ = 2122502112.

The previous prime is 6391275361. The next prime is 6391275391. The reversal of 6391275372 is 2735721936.

6391275372 is a `hidden beast` number, since 6 + 3 + 9 + 1 + 275 + 372 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 320308 + ... + 339675.

It is an arithmetic number, because the mean of its divisors is an integer number (450439080).

Almost surely, 2^6391275372 is an apocalyptic number.

It is an amenable number.

6391275372 is an abundant number, since it is smaller than the sum of its proper divisors (9824531508).

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

6391275372 is a wasteful number, since it uses less digits than its factorization.

6391275372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660262 (or 660257 counting only the distinct ones).

The product of its digits is 476280, while the sum is 45.

The square root of 6391275372 is about 79945.4524785494. The cubic root of 6391275372 is about 1855.7914802866.

The spelling of 6391275372 in words is "six billion, three hundred ninety-one million, two hundred seventy-five thousand, three hundred seventy-two".