70038991561 has 32 divisors (see below), whose sum is σ = 89357875200. Its totient is φ = 53760793680.

The previous prime is 70038991511. The next prime is 70038991597. The reversal of 70038991561 is 16519983007.

It is not a de Polignac number, because 70038991561 - 2¹³ = 70038983369 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (70038991511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 568140 + ... + 680338.

It is an arithmetic number, because the mean of its divisors is an integer number (2792433600).

Almost surely, 2^70038991561 is an apocalyptic number.

It is an amenable number.

70038991561 is a deficient number, since it is larger than the sum of its proper divisors (19318883639).

70038991561 is a wasteful number, since it uses less digits than its factorization.

70038991561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112306 (or 112284 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 70038991561 in words is "seventy billion, thirty-eight million, nine hundred ninety-one thousand, five hundred sixty-one".