78151953 has 16 divisors (see below), whose sum is σ = 118619136. Its totient is φ = 45305040.

The previous prime is 78151951. The next prime is 78151963. The reversal of 78151953 is 35915187.

It is not a de Polignac number, because 78151953 - 2¹ = 78151951 is a prime.

It is a super-2 number, since 2×78151953² = 12215455515428418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78151951) 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, 50725 + ... + 52242.

It is an arithmetic number, because the mean of its divisors is an integer number (7413696).

Almost surely, 2^78151953 is an apocalyptic number.

It is an amenable number.

78151953 is a deficient number, since it is larger than the sum of its proper divisors (40467183).

78151953 is a wasteful number, since it uses less digits than its factorization.

78151953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103004.

The product of its digits is 37800, while the sum is 39.

The square root of 78151953 is about 8840.3593252763. The cubic root of 78151953 is about 427.5431425972.

The spelling of 78151953 in words is "seventy-eight million, one hundred fifty-one thousand, nine hundred fifty-three".