11751531057 has 32 divisors (see below), whose sum is σ = 20538613760. Its totient is φ = 6498539280.

The previous prime is 11751531031. The next prime is 11751531083. The reversal of 11751531057 is 75013515711.

11751531057 is a `hidden beast` number, since 1 + 1 + 75 + 1 + 531 + 0 + 57 = 666.

It is an interprime number because it is at equal distance from previous prime (11751531031) and next prime (11751531083).

It is not a de Polignac number, because 11751531057 - 2¹⁹ = 11751006769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11751531257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 997003 + ... + 1008720.

It is an arithmetic number, because the mean of its divisors is an integer number (641831680).

Almost surely, 2^11751531057 is an apocalyptic number.

It is an amenable number.

11751531057 is a deficient number, since it is larger than the sum of its proper divisors (8787082703).

11751531057 is a wasteful number, since it uses less digits than its factorization.

11751531057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005770 (or 2005764 counting only the distinct ones).

The product of its (nonzero) digits is 18375, while the sum is 36.

The spelling of 11751531057 in words is "eleven billion, seven hundred fifty-one million, five hundred thirty-one thousand, fifty-seven".