7515979473 has 12 divisors (see below), whose sum is σ = 10549661840. Its totient is φ = 4746521016.

The previous prime is 7515979403. The next prime is 7515979483. The reversal of 7515979473 is 3749795157.

7515979473 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-7515979473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (7515979403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 648790 + ... + 660272.

Almost surely, 2^7515979473 is an apocalyptic number.

It is an amenable number.

7515979473 is a deficient number, since it is larger than the sum of its proper divisors (3033682367).

7515979473 is an frugal number, since it uses more digits than its factorization.

7515979473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22988 (or 11505 counting only the distinct ones).

The product of its digits is 8334900, while the sum is 57.

The square root of 7515979473 is about 86694.7488202140. The cubic root of 7515979473 is about 1958.8230016068.

Multiplying 7515979473 by its sum of digits (57), we get a square (428410829961 = 654531²).

7515979473 divided by its sum of digits (57) gives a square (131859289 = 11483²).

The spelling of 7515979473 in words is "seven billion, five hundred fifteen million, nine hundred seventy-nine thousand, four hundred seventy-three".