78625455 has 32 divisors (see below), whose sum is σ = 130498560. Its totient is φ = 40381440.

The previous prime is 78625451. The next prime is 78625487. The reversal of 78625455 is 55452687.

It is not a de Polignac number, because 78625455 - 2² = 78625451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78625451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163906 + ... + 164384.

It is an arithmetic number, because the mean of its divisors is an integer number (4078080).

Almost surely, 2^78625455 is an apocalyptic number.

78625455 is a deficient number, since it is larger than the sum of its proper divisors (51873105).

78625455 is a wasteful number, since it uses less digits than its factorization.

78625455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871.

The product of its digits is 336000, while the sum is 42.

The square root of 78625455 is about 8867.0995821633. The cubic root of 78625455 is about 428.4048615409.

The spelling of 78625455 in words is "seventy-eight million, six hundred twenty-five thousand, four hundred fifty-five".