64064557 has 4 divisors (see below), whose sum is σ = 64080576. Its totient is φ = 64048540.

The previous prime is 64064549. The next prime is 64064563. The reversal of 64064557 is 75546046.

It is a happy number.

64064557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 64064557 - 2³ = 64064549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64064657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3582 + ... + 11872.

It is an arithmetic number, because the mean of its divisors is an integer number (16020144).

Almost surely, 2^64064557 is an apocalyptic number.

It is an amenable number.

64064557 is a deficient number, since it is larger than the sum of its proper divisors (16019).

64064557 is an equidigital number, since it uses as much as digits as its factorization.

64064557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16018.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 64064557 is about 8004.0337955309. The cubic root of 64064557 is about 400.1344485539.

It can be divided in two parts, 6406455 and 7, that multiplied together give a triangular number (44845185 = T₉₄₇₀).

The spelling of 64064557 in words is "sixty-four million, sixty-four thousand, five hundred fifty-seven".