11651111115555 has 32 divisors (see below), whose sum is σ = 19153455190848. Its totient is φ = 6043504435200.

The previous prime is 11651111115529. The next prime is 11651111115559. The reversal of 11651111115555 is 55551111115611.

It is not a de Polignac number, because 11651111115555 - 2⁶ = 11651111115491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11651111115559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2945326 + ... + 5654835.

It is an arithmetic number, because the mean of its divisors is an integer number (598545474714).

Almost surely, 2^{11651111115555} is an apocalyptic number.

11651111115555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11651111115555 is a deficient number, since it is larger than the sum of its proper divisors (7502344075293).

11651111115555 is a wasteful number, since it uses less digits than its factorization.

11651111115555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8602647.

The product of its digits is 18750, while the sum is 39.

The spelling of 11651111115555 in words is "eleven trillion, six hundred fifty-one billion, one hundred eleven million, one hundred fifteen thousand, five hundred fifty-five".