1057616657 has 4 divisors (see below), whose sum is σ = 1057681956. Its totient is φ = 1057551360.

The previous prime is 1057616633. The next prime is 1057616683. The reversal of 1057616657 is 7566167501.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 510805201 + 546811456 = 22601^2 + 23384^2 .

It is a cyclic number.

It is not a de Polignac number, because 1057616657 - 2⁸ = 1057616401 is a prime.

It is a super-2 number, since 2×1057616657² = 2237105986327711298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1057616957) 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, 11993 + ... + 47529.

It is an arithmetic number, because the mean of its divisors is an integer number (264420489).

Almost surely, 2^1057616657 is an apocalyptic number.

It is an amenable number.

1057616657 is a deficient number, since it is larger than the sum of its proper divisors (65299).

1057616657 is an equidigital number, since it uses as much as digits as its factorization.

1057616657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65298.

The product of its (nonzero) digits is 264600, while the sum is 44.

The square root of 1057616657 is about 32521.0186956067. The cubic root of 1057616657 is about 1018.8480706422.

The spelling of 1057616657 in words is "one billion, fifty-seven million, six hundred sixteen thousand, six hundred fifty-seven".