78631151 has 8 divisors (see below), whose sum is σ = 82490400. Its totient is φ = 74848480.

The previous prime is 78631123. The next prime is 78631169. The reversal of 78631151 is 15113687.

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

It is a cyclic number.

It is not a de Polignac number, because 78631151 - 2⁶ = 78631087 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 (78631051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17036 + ... + 21153.

It is an arithmetic number, because the mean of its divisors is an integer number (10311300).

Almost surely, 2^78631151 is an apocalyptic number.

78631151 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

78631151 is a deficient number, since it is larger than the sum of its proper divisors (3859249).

78631151 is a wasteful number, since it uses less digits than its factorization.

78631151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38289.

The product of its digits is 5040, while the sum is 32.

The square root of 78631151 is about 8867.4207636719. The cubic root of 78631151 is about 428.4152065162.

The spelling of 78631151 in words is "seventy-eight million, six hundred thirty-one thousand, one hundred fifty-one".