11507212557 has 24 divisors (see below), whose sum is σ = 17207275800. Its totient is φ = 7401518208.

The previous prime is 11507212553. The next prime is 11507212567. The reversal of 11507212557 is 75521270511.

It can be written as a sum of positive squares in 4 ways, for example, as 79816356 + 11427396201 = 8934^2 + 106899^2 .

It is not a de Polignac number, because 11507212557 - 2² = 11507212553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11507212553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 357543 + ... + 388395.

It is an arithmetic number, because the mean of its divisors is an integer number (716969825).

Almost surely, 2^11507212557 is an apocalyptic number.

It is an amenable number.

11507212557 is a deficient number, since it is larger than the sum of its proper divisors (5700063243).

11507212557 is a wasteful number, since it uses less digits than its factorization.

11507212557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32317 (or 32314 counting only the distinct ones).

The product of its (nonzero) digits is 24500, while the sum is 36.

The spelling of 11507212557 in words is "eleven billion, five hundred seven million, two hundred twelve thousand, five hundred fifty-seven".