79825615 has 16 divisors (see below), whose sum is σ = 97050240. Its totient is φ = 63027360.

The previous prime is 79825553. The next prime is 79825619. The reversal of 79825615 is 51652897.

It is not a de Polignac number, because 79825615 - 2¹¹ = 79823567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79825619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229872 + ... + 230218.

It is an arithmetic number, because the mean of its divisors is an integer number (6065640).

Almost surely, 2^79825615 is an apocalyptic number.

79825615 is a deficient number, since it is larger than the sum of its proper divisors (17224625).

79825615 is a wasteful number, since it uses less digits than its factorization.

79825615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822.

The product of its digits is 151200, while the sum is 43.

The square root of 79825615 is about 8934.5181739140. The cubic root of 79825615 is about 430.5736259977.

The spelling of 79825615 in words is "seventy-nine million, eight hundred twenty-five thousand, six hundred fifteen".