64723551475 has 96 divisors (see below), whose sum is σ = 91735628544. Its totient is φ = 44884569600.

The previous prime is 64723551437. The next prime is 64723551553. The reversal of 64723551475 is 57415532746.

64723551475 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64723551475 - 2¹⁵ = 64723518707 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 146102604 + ... + 146103046.

It is an arithmetic number, because the mean of its divisors is an integer number (955579464).

Almost surely, 2^64723551475 is an apocalyptic number.

64723551475 is a deficient number, since it is larger than the sum of its proper divisors (27012077069).

64723551475 is a wasteful number, since it uses less digits than its factorization.

64723551475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757 (or 752 counting only the distinct ones).

The product of its digits is 3528000, while the sum is 49.

The spelling of 64723551475 in words is "sixty-four billion, seven hundred twenty-three million, five hundred fifty-one thousand, four hundred seventy-five".