78516151 has 16 divisors (see below), whose sum is σ = 96659200. Its totient is φ = 62270208.

The previous prime is 78516133. The next prime is 78516167. The reversal of 78516151 is 15161587.

It is a de Polignac number, because none of the positive numbers 2^k-78516151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78519151) 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, 1146 + ... + 12583.

It is an arithmetic number, because the mean of its divisors is an integer number (6041200).

Almost surely, 2^78516151 is an apocalyptic number.

78516151 is a deficient number, since it is larger than the sum of its proper divisors (18143049).

78516151 is a wasteful number, since it uses less digits than its factorization.

78516151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13798.

The product of its digits is 8400, while the sum is 34.

The square root of 78516151 is about 8860.9339801174. The cubic root of 78516151 is about 428.2062486749.

It can be divided in two parts, 7 and 8516151, that added together give a palindrome (8516158).

The spelling of 78516151 in words is "seventy-eight million, five hundred sixteen thousand, one hundred fifty-one".