78700172831 has 8 divisors (see below), whose sum is σ = 89945823264. Its totient is φ = 67455214560.

The previous prime is 78700172737. The next prime is 78700172839. The reversal of 78700172831 is 13827100787.

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 78700172831 - 2²² = 78695978527 is a prime.

It is a super-2 number, since 2×78700172831² (a number of 23 digits) 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 (78700172839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99161 + ... + 408941.

It is an arithmetic number, because the mean of its divisors is an integer number (11243227908).

Almost surely, 2^78700172831 is an apocalyptic number.

78700172831 is a deficient number, since it is larger than the sum of its proper divisors (11245650433).

78700172831 is a wasteful number, since it uses less digits than its factorization.

78700172831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346081.

The product of its (nonzero) digits is 131712, while the sum is 44.

The spelling of 78700172831 in words is "seventy-eight billion, seven hundred million, one hundred seventy-two thousand, eight hundred thirty-one".