78955251 has 8 divisors (see below), whose sum is σ = 109850880. Its totient is φ = 50348232.

The previous prime is 78955243. The next prime is 78955369. The reversal of 78955251 is 15255987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78955251 - 2³ = 78955243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78955231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572071 + ... + 572208.

It is an arithmetic number, because the mean of its divisors is an integer number (13731360).

Almost surely, 2^78955251 is an apocalyptic number.

78955251 is a deficient number, since it is larger than the sum of its proper divisors (30895629).

78955251 is a wasteful number, since it uses less digits than its factorization.

78955251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144305.

The product of its digits is 126000, while the sum is 42.

The square root of 78955251 is about 8885.6767328099. The cubic root of 78955251 is about 429.0030101777.

The spelling of 78955251 in words is "seventy-eight million, nine hundred fifty-five thousand, two hundred fifty-one".