11512991357 has 8 divisors (see below), whose sum is σ = 13159686336. Its totient is φ = 9866791872.

The previous prime is 11512991291. The next prime is 11512991363. The reversal of 11512991357 is 75319921511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11512991357 - 2²⁰ = 11511942781 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 (11512991377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72668 + ... + 168245.

It is an arithmetic number, because the mean of its divisors is an integer number (1644960792).

Almost surely, 2^11512991357 is an apocalyptic number.

It is an amenable number.

11512991357 is a deficient number, since it is larger than the sum of its proper divisors (1646694979).

11512991357 is an equidigital number, since it uses as much as digits as its factorization.

11512991357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247747.

The product of its digits is 85050, while the sum is 44.

The spelling of 11512991357 in words is "eleven billion, five hundred twelve million, nine hundred ninety-one thousand, three hundred fifty-seven".