11551787513 has 16 divisors (see below), whose sum is σ = 13981670400. Its totient is φ = 9329663376.

The previous prime is 11551787477. The next prime is 11551787519. The reversal of 11551787513 is 31578715511.

It is a cyclic number.

It is not a de Polignac number, because 11551787513 - 2¹² = 11551783417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11551787519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524663 + ... + 546236.

It is an arithmetic number, because the mean of its divisors is an integer number (873854400).

Almost surely, 2^11551787513 is an apocalyptic number.

It is an amenable number.

11551787513 is a deficient number, since it is larger than the sum of its proper divisors (2429882887).

11551787513 is a wasteful number, since it uses less digits than its factorization.

11551787513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070996.

The product of its digits is 147000, while the sum is 44.

The spelling of 11551787513 in words is "eleven billion, five hundred fifty-one million, seven hundred eighty-seven thousand, five hundred thirteen".