10557396509 has 4 divisors (see below), whose sum is σ = 11517159840. Its totient is φ = 9597633180.

The previous prime is 10557396467. The next prime is 10557396539. The reversal of 10557396509 is 90569375501.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90569375501 = 11 ⋅8233579591.

It is a cyclic number.

It is not a de Polignac number, because 10557396509 - 2²⁰ = 10556347933 is a prime.

It is a super-2 number, since 2×10557396509² (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 (10557396539) 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, 479881649 + ... + 479881670.

It is an arithmetic number, because the mean of its divisors is an integer number (2879289960).

Almost surely, 2^10557396509 is an apocalyptic number.

It is an amenable number.

10557396509 is a deficient number, since it is larger than the sum of its proper divisors (959763331).

10557396509 is an equidigital number, since it uses as much as digits as its factorization.

10557396509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959763330.

The product of its (nonzero) digits is 1275750, while the sum is 50.

The spelling of 10557396509 in words is "ten billion, five hundred fifty-seven million, three hundred ninety-six thousand, five hundred nine".