64610057 has 8 divisors (see below), whose sum is σ = 67105800. Its totient is φ = 62132224.

The previous prime is 64610023. The next prime is 64610083. The reversal of 64610057 is 75001646.

It can be written as a sum of positive squares in 4 ways, for example, as 27290176 + 37319881 = 5224^2 + 6109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64610057 - 2¹⁰ = 64609033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64610257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3119 + ... + 11787.

It is an arithmetic number, because the mean of its divisors is an integer number (8388225).

Almost surely, 2^64610057 is an apocalyptic number.

It is an amenable number.

64610057 is a deficient number, since it is larger than the sum of its proper divisors (2495743).

64610057 is a wasteful number, since it uses less digits than its factorization.

64610057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8955.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 64610057 is about 8038.0381312855. The cubic root of 64610057 is about 401.2669350357.

Subtracting from 64610057 its sum of digits (29), we obtain a triangular number (64610028 = T₁₁₃₆₇).

The spelling of 64610057 in words is "sixty-four million, six hundred ten thousand, fifty-seven".