64587748394 has 12 divisors (see below), whose sum is σ = 104907319686. Its totient is φ = 29809729872.

The previous prime is 64587748361. The next prime is 64587748483. The reversal of 64587748394 is 49384778546.

64587748394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 40688134369 + 23899614025 = 201713^2 + 154595^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64587748394.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95543669 + ... + 95544344.

Almost surely, 2^64587748394 is an apocalyptic number.

64587748394 is a deficient number, since it is larger than the sum of its proper divisors (40319571292).

64587748394 is a wasteful number, since it uses less digits than its factorization.

64587748394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191088041 (or 191088028 counting only the distinct ones).

The product of its digits is 162570240, while the sum is 65.

The spelling of 64587748394 in words is "sixty-four billion, five hundred eighty-seven million, seven hundred forty-eight thousand, three hundred ninety-four".