78670732929631 has 4 divisors (see below), whose sum is σ = 78908408860264. Its totient is φ = 78433056999000.

The previous prime is 78670732929629. The next prime is 78670732929637. The reversal of 78670732929631 is 13692923707687.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78670732929631 - 2¹ = 78670732929629 is a prime.

It is a super-2 number, since 2×78670732929631² (a number of 29 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 (78670732929637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118837964820 + ... + 118837965481.

It is an arithmetic number, because the mean of its divisors is an integer number (19727102215066).

Almost surely, 2^{78670732929631} is an apocalyptic number.

78670732929631 is a deficient number, since it is larger than the sum of its proper divisors (237675930633).

78670732929631 is a wasteful number, since it uses less digits than its factorization.

78670732929631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237675930632.

The product of its (nonzero) digits is 288054144, while the sum is 70.

The spelling of 78670732929631 in words is "seventy-eight trillion, six hundred seventy billion, seven hundred thirty-two million, nine hundred twenty-nine thousand, six hundred thirty-one".