64055657 has 4 divisors (see below), whose sum is σ = 64654416. Its totient is φ = 63456900.

The previous prime is 64055647. The next prime is 64055659. The reversal of 64055657 is 75655046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64055657 - 2⁸ = 64055401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64055657.

It is not an unprimeable number, because it can be changed into a prime (64055659) 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, 299219 + ... + 299432.

It is an arithmetic number, because the mean of its divisors is an integer number (16163604).

Almost surely, 2^64055657 is an apocalyptic number.

It is an amenable number.

64055657 is a deficient number, since it is larger than the sum of its proper divisors (598759).

64055657 is a wasteful number, since it uses less digits than its factorization.

64055657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598758.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 64055657 is about 8003.4778065538. The cubic root of 64055657 is about 400.1159184873.

The spelling of 64055657 in words is "sixty-four million, fifty-five thousand, six hundred fifty-seven".