11623551015511 has 4 divisors (see below), whose sum is σ = 11624206361152. Its totient is φ = 11622895669872.

The previous prime is 11623551015497. The next prime is 11623551015541. The reversal of 11623551015511 is 11551015532611.

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

It is a cyclic number.

It is not a de Polignac number, because 11623551015511 - 2²⁵ = 11623517461079 is a prime.

It is a super-2 number, since 2×11623551015511² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11623551015541) 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, 327646215 + ... + 327681688.

It is an arithmetic number, because the mean of its divisors is an integer number (2906051590288).

Almost surely, 2^{11623551015511} is an apocalyptic number.

11623551015511 is a deficient number, since it is larger than the sum of its proper divisors (655345641).

11623551015511 is an equidigital number, since it uses as much as digits as its factorization.

11623551015511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655345640.

The product of its (nonzero) digits is 22500, while the sum is 37.

The spelling of 11623551015511 in words is "eleven trillion, six hundred twenty-three billion, five hundred fifty-one million, fifteen thousand, five hundred eleven".