78264151 has 4 divisors (see below), whose sum is σ = 89444752. Its totient is φ = 67083552.

The previous prime is 78264133. The next prime is 78264157. The reversal of 78264151 is 15146287.

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 78264151 - 2⁹ = 78263639 is a prime.

It is a super-2 number, since 2×78264151² = 12250554663501602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78264157) 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, 5590290 + ... + 5590303.

It is an arithmetic number, because the mean of its divisors is an integer number (22361188).

Almost surely, 2^78264151 is an apocalyptic number.

78264151 is a deficient number, since it is larger than the sum of its proper divisors (11180601).

78264151 is a wasteful number, since it uses less digits than its factorization.

78264151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11180600.

The product of its digits is 13440, while the sum is 34.

The square root of 78264151 is about 8846.7028321290. The cubic root of 78264151 is about 427.7476439834.

The spelling of 78264151 in words is "seventy-eight million, two hundred sixty-four thousand, one hundred fifty-one".