10565198957 has 4 divisors (see below), whose sum is σ = 11121262080. Its totient is φ = 10009135836.

The previous prime is 10565198953. The next prime is 10565198999. The reversal of 10565198957 is 75989156501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10565198957 - 2² = 10565198953 is a prime.

It is a super-2 number, since 2×10565198957² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10565198953) 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, 278031533 + ... + 278031570.

It is an arithmetic number, because the mean of its divisors is an integer number (2780315520).

Almost surely, 2^10565198957 is an apocalyptic number.

It is an amenable number.

10565198957 is a deficient number, since it is larger than the sum of its proper divisors (556063123).

10565198957 is an equidigital number, since it uses as much as digits as its factorization.

10565198957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556063122.

The product of its (nonzero) digits is 3402000, while the sum is 56.

The spelling of 10565198957 in words is "ten billion, five hundred sixty-five million, one hundred ninety-eight thousand, nine hundred fifty-seven".