70991997922 has 32 divisors (see below), whose sum is σ = 108855835200. Its totient is φ = 34717267200.

The previous prime is 70991997911. The next prime is 70991997929. The reversal of 70991997922 is 22979919907.

It is not an unprimeable number, because it can be changed into a prime (70991997929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6947397 + ... + 6957607.

It is an arithmetic number, because the mean of its divisors is an integer number (3401744850).

Almost surely, 2^70991997922 is an apocalyptic number.

70991997922 is a deficient number, since it is larger than the sum of its proper divisors (37863837278).

70991997922 is a wasteful number, since it uses less digits than its factorization.

70991997922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10722.

The product of its (nonzero) digits is 11573604, while the sum is 64.

The spelling of 70991997922 in words is "seventy billion, nine hundred ninety-one million, nine hundred ninety-seven thousand, nine hundred twenty-two".