78525513 has 12 divisors (see below), whose sum is σ = 123737328. Its totient is φ = 47591160.

The previous prime is 78525493. The next prime is 78525521. The reversal of 78525513 is 31552587.

It is not a de Polignac number, because 78525513 - 2⁹ = 78525001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78525563) 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, 396495 + ... + 396692.

It is an arithmetic number, because the mean of its divisors is an integer number (10311444).

Almost surely, 2^78525513 is an apocalyptic number.

It is an amenable number.

78525513 is a deficient number, since it is larger than the sum of its proper divisors (45211815).

78525513 is a wasteful number, since it uses less digits than its factorization.

78525513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793204 (or 793201 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 78525513 is about 8861.4622382539. The cubic root of 78525513 is about 428.2232672862.

The spelling of 78525513 in words is "seventy-eight million, five hundred twenty-five thousand, five hundred thirteen".