6513973907 has 6 divisors (see below), whose sum is σ = 7577479908. Its totient is φ = 5583406164.

The previous prime is 6513973903. The next prime is 6513973951. The reversal of 6513973907 is 7093793156.

It is not a de Polignac number, because 6513973907 - 2² = 6513973903 is a prime.

It is a super-2 number, since 2×6513973907² = 84863712122153689298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6513973903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66469073 + ... + 66469170.

It is an arithmetic number, because the mean of its divisors is an integer number (1262913318).

Almost surely, 2^6513973907 is an apocalyptic number.

6513973907 is a deficient number, since it is larger than the sum of its proper divisors (1063506001).

6513973907 is a wasteful number, since it uses less digits than its factorization.

6513973907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132938257 (or 132938250 counting only the distinct ones).

The product of its (nonzero) digits is 1071630, while the sum is 50.

The square root of 6513973907 is about 80709.1934478347. The cubic root of 6513973907 is about 1867.5919997305.

The spelling of 6513973907 in words is "six billion, five hundred thirteen million, nine hundred seventy-three thousand, nine hundred seven".