78015916 has 24 divisors (see below), whose sum is σ = 154077840. Its totient is φ = 34238400.

The previous prime is 78015913. The next prime is 78015923. The reversal of 78015916 is 61951087.

It is not an unprimeable number, because it can be changed into a prime (78015913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29295 + ... + 31846.

It is an arithmetic number, because the mean of its divisors is an integer number (6419910).

Almost surely, 2^78015916 is an apocalyptic number.

It is an amenable number.

78015916 is a deficient number, since it is larger than the sum of its proper divisors (76061924).

78015916 is a wasteful number, since it uses less digits than its factorization.

78015916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61185 (or 61183 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 78015916 is about 8832.6618864304. The cubic root of 78015916 is about 427.2949275761.

The spelling of 78015916 in words is "seventy-eight million, fifteen thousand, nine hundred sixteen".