70686831988 has 12 divisors (see below), whose sum is σ = 123706290820. Its totient is φ = 35342177472.

The previous prime is 70686831889. The next prime is 70686832061. The reversal of 70686831988 is 88913868607.

It can be written as a sum of positive squares in 2 ways, for example, as 54836525584 + 15850306404 = 234172^2 + 125898^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174681 + ... + 414592.

Almost surely, 2^70686831988 is an apocalyptic number.

It is an amenable number.

70686831988 is a deficient number, since it is larger than the sum of its proper divisors (53019458832).

70686831988 is a wasteful number, since it uses less digits than its factorization.

70686831988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619266 (or 619264 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 64.

The spelling of 70686831988 in words is "seventy billion, six hundred eighty-six million, eight hundred thirty-one thousand, nine hundred eighty-eight".