57071765 has 8 divisors (see below), whose sum is σ = 69424728. Its totient is φ = 45031680.

The previous prime is 57071759. The next prime is 57071779. The reversal of 57071765 is 56717075.

It can be written as a sum of positive squares in 4 ways, for example, as 3034564 + 54037201 = 1742^2 + 7351^2 .

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

It is not a de Polignac number, because 57071765 - 2¹⁴ = 57055381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77816 + ... + 78545.

It is an arithmetic number, because the mean of its divisors is an integer number (8678091).

Almost surely, 2^57071765 is an apocalyptic number.

It is an amenable number.

57071765 is a deficient number, since it is larger than the sum of its proper divisors (12352963).

57071765 is a wasteful number, since it uses less digits than its factorization.

57071765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156439.

The product of its (nonzero) digits is 51450, while the sum is 38.

The square root of 57071765 is about 7554.5856934712. The cubic root of 57071765 is about 385.0115586567.

The spelling of 57071765 in words is "fifty-seven million, seventy-one thousand, seven hundred sixty-five".