78160715 has 4 divisors (see below), whose sum is σ = 93792864. Its totient is φ = 62528568.

The previous prime is 78160711. The next prime is 78160721. The reversal of 78160715 is 51706187.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78160715 - 2² = 78160711 is a prime.

It is a super-2 number, since 2×78160715² = 12218194738622450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78160711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7816067 + ... + 7816076.

It is an arithmetic number, because the mean of its divisors is an integer number (23448216).

Almost surely, 2^78160715 is an apocalyptic number.

78160715 is a deficient number, since it is larger than the sum of its proper divisors (15632149).

78160715 is a wasteful number, since it uses less digits than its factorization.

78160715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15632148.

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 78160715 is about 8840.8548794786. The cubic root of 78160715 is about 427.5591199886.

The spelling of 78160715 in words is "seventy-eight million, one hundred sixty thousand, seven hundred fifteen".