19701157064 has 64 divisors (see below), whose sum is σ = 39618558000. Its totient is φ = 9151709184.

The previous prime is 19701157043. The next prime is 19701157079. The reversal of 19701157064 is 46075110791.

It can be written as a sum of positive squares in 8 ways, for example, as 2057348164 + 17643808900 = 45358^2 + 132830^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5710412 + ... + 5713860.

Almost surely, 2^19701157064 is an apocalyptic number.

It is an amenable number.

19701157064 is an abundant number, since it is smaller than the sum of its proper divisors (19917400936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19701157064 is a wasteful number, since it uses less digits than its factorization.

19701157064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002 (or 3998 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 41.

The spelling of 19701157064 in words is "nineteen billion, seven hundred one million, one hundred fifty-seven thousand, sixty-four".