11520961157 has 4 divisors (see below), whose sum is σ = 11521180620. Its totient is φ = 11520741696.

The previous prime is 11520961121. The next prime is 11520961171. The reversal of 11520961157 is 75116902511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4817609281 + 6703351876 = 69409^2 + 81874^2 .

It is a cyclic number.

It is not a de Polignac number, because 11520961157 - 2¹⁶ = 11520895621 is a prime.

It is a super-2 number, since 2×11520961157² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11520961157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11520961357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20663 + ... + 153195.

It is an arithmetic number, because the mean of its divisors is an integer number (2880295155).

Almost surely, 2^11520961157 is an apocalyptic number.

It is an amenable number.

11520961157 is a deficient number, since it is larger than the sum of its proper divisors (219463).

11520961157 is an equidigital number, since it uses as much as digits as its factorization.

11520961157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219462.

The product of its (nonzero) digits is 18900, while the sum is 38.

The spelling of 11520961157 in words is "eleven billion, five hundred twenty million, nine hundred sixty-one thousand, one hundred fifty-seven".