78611315 has 16 divisors (see below), whose sum is σ = 103330080. Its totient is φ = 57146880.

The previous prime is 78611287. The next prime is 78611317. The reversal of 78611315 is 51311687.

It is not a de Polignac number, because 78611315 - 2¹² = 78607219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78611317) 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, 13481 + ... + 18410.

It is an arithmetic number, because the mean of its divisors is an integer number (6458130).

Almost surely, 2^78611315 is an apocalyptic number.

78611315 is a deficient number, since it is larger than the sum of its proper divisors (24718765).

78611315 is a wasteful number, since it uses less digits than its factorization.

78611315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31942.

The product of its digits is 5040, while the sum is 32.

The square root of 78611315 is about 8866.3022168207. The cubic root of 78611315 is about 428.3791785611.

The spelling of 78611315 in words is "seventy-eight million, six hundred eleven thousand, three hundred fifteen".