11611724551 has 8 divisors (see below), whose sum is σ = 13275684864. Its totient is φ = 9949049880.

The previous prime is 11611724521. The next prime is 11611724561. The reversal of 11611724551 is 15542711611.

11611724551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11611724551 - 2²⁵ = 11578170119 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 (11611724521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301975 + ... + 338248.

It is an arithmetic number, because the mean of its divisors is an integer number (1659460608).

Almost surely, 2^11611724551 is an apocalyptic number.

11611724551 is a deficient number, since it is larger than the sum of its proper divisors (1663960313).

11611724551 is an equidigital number, since it uses as much as digits as its factorization.

11611724551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642821.

The product of its digits is 8400, while the sum is 34.

The spelling of 11611724551 in words is "eleven billion, six hundred eleven million, seven hundred twenty-four thousand, five hundred fifty-one".