11357755521 has 12 divisors (see below), whose sum is σ = 17616110832. Its totient is φ = 6490145928.

The previous prime is 11357755499. The next prime is 11357755537. The reversal of 11357755521 is 12555775311.

It is not a de Polignac number, because 11357755521 - 2⁷ = 11357755393 is a prime.

It is a super-2 number, since 2×11357755521² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11357755561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38631675 + ... + 38631968.

It is an arithmetic number, because the mean of its divisors is an integer number (1468009236).

Almost surely, 2^11357755521 is an apocalyptic number.

It is an amenable number.

11357755521 is a deficient number, since it is larger than the sum of its proper divisors (6258355311).

11357755521 is an equidigital number, since it uses as much as digits as its factorization.

11357755521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77263660 (or 77263653 counting only the distinct ones).

The product of its digits is 183750, while the sum is 42.

The spelling of 11357755521 in words is "eleven billion, three hundred fifty-seven million, seven hundred fifty-five thousand, five hundred twenty-one".