57640145 has 4 divisors (see below), whose sum is σ = 69168180. Its totient is φ = 46112112.

The previous prime is 57640123. The next prime is 57640153. The reversal of 57640145 is 54104675.

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 21049744 + 36590401 = 4588^2 + 6049^2 .

It is a cyclic number.

It is not a de Polignac number, because 57640145 - 2¹⁶ = 57574609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5764010 + ... + 5764019.

It is an arithmetic number, because the mean of its divisors is an integer number (17292045).

Almost surely, 2^57640145 is an apocalyptic number.

It is an amenable number.

57640145 is a deficient number, since it is larger than the sum of its proper divisors (11528035).

57640145 is a wasteful number, since it uses less digits than its factorization.

57640145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11528034.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 57640145 is about 7592.1107078335. The cubic root of 57640145 is about 386.2854542362.

The spelling of 57640145 in words is "fifty-seven million, six hundred forty thousand, one hundred forty-five".