64764455057 has 4 divisors (see below), whose sum is σ = 64769014500. Its totient is φ = 64759895616.

The previous prime is 64764455047. The next prime is 64764455081. The reversal of 64764455057 is 75055446746.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55408922881 + 9355532176 = 235391^2 + 96724^2 .

It is a cyclic number.

It is not a de Polignac number, because 64764455057 - 2⁸ = 64764454801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64764455027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2258348 + ... + 2286845.

It is an arithmetic number, because the mean of its divisors is an integer number (16192253625).

Almost surely, 2^64764455057 is an apocalyptic number.

It is an amenable number.

64764455057 is a deficient number, since it is larger than the sum of its proper divisors (4559443).

64764455057 is a wasteful number, since it uses less digits than its factorization.

64764455057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4559442.

The product of its (nonzero) digits is 14112000, while the sum is 53.

The spelling of 64764455057 in words is "sixty-four billion, seven hundred sixty-four million, four hundred fifty-five thousand, fifty-seven".