1157570561 has 6 divisors (see below), whose sum is σ = 1346561730. Its totient is φ = 992203296.

The previous prime is 1157570551. The next prime is 1157570569. The reversal of 1157570561 is 1650757511.

It can be written as a sum of positive squares in only one way, i.e., 1110222400 + 47348161 = 33320^2 + 6881^2 .

It is not a de Polignac number, because 1157570561 - 2¹⁸ = 1157308417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1157570569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11811896 + ... + 11811993.

It is an arithmetic number, because the mean of its divisors is an integer number (224426955).

Almost surely, 2^1157570561 is an apocalyptic number.

It is an amenable number.

1157570561 is a deficient number, since it is larger than the sum of its proper divisors (188991169).

1157570561 is an equidigital number, since it uses as much as digits as its factorization.

1157570561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23623903 (or 23623896 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 38.

The square root of 1157570561 is about 34023.0886458005. The cubic root of 1157570561 is about 1049.9835404827.

The spelling of 1157570561 in words is "one billion, one hundred fifty-seven million, five hundred seventy thousand, five hundred sixty-one".