70391813873 has 4 divisors (see below), whose sum is σ = 71182733220. Its totient is φ = 69600894528.

The previous prime is 70391813831. The next prime is 70391813893. The reversal of 70391813873 is 37831819307.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7855808689 + 62536005184 = 88633^2 + 250072^2 .

It is a cyclic number.

It is not a de Polignac number, because 70391813873 - 2⁸ = 70391813617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70391813803) 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, 395459540 + ... + 395459717.

It is an arithmetic number, because the mean of its divisors is an integer number (17795683305).

Almost surely, 2^70391813873 is an apocalyptic number.

It is an amenable number.

70391813873 is a deficient number, since it is larger than the sum of its proper divisors (790919347).

70391813873 is an equidigital number, since it uses as much as digits as its factorization.

70391813873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790919346.

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 70391813873 in words is "seventy billion, three hundred ninety-one million, eight hundred thirteen thousand, eight hundred seventy-three".