11172015056557 has 4 divisors (see below), whose sum is σ = 11230507282176. Its totient is φ = 11113522830940.

The previous prime is 11172015056479. The next prime is 11172015056567. The reversal of 11172015056557 is 75565051027111.

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 11172015056557 - 2²⁷ = 11171880838829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11172015056567) 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, 29246112523 + ... + 29246112904.

It is an arithmetic number, because the mean of its divisors is an integer number (2807626820544).

Almost surely, 2^{11172015056557} is an apocalyptic number.

It is an amenable number.

11172015056557 is a deficient number, since it is larger than the sum of its proper divisors (58492225619).

11172015056557 is an equidigital number, since it uses as much as digits as its factorization.

11172015056557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58492225618.

The product of its (nonzero) digits is 367500, while the sum is 46.

The spelling of 11172015056557 in words is "eleven trillion, one hundred seventy-two billion, fifteen million, fifty-six thousand, five hundred fifty-seven".