54251666615511 has 24 divisors (see below), whose sum is σ = 80196538181760. Its totient is φ = 35321991271056.

The previous prime is 54251666615441. The next prime is 54251666615527. The reversal of 54251666615511 is 11551666615245.

It is not a de Polignac number, because 54251666615511 - 2²⁶ = 54251599506647 is a prime.

It is a super-2 number, since 2×54251666615511² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54251666615411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6347401 + ... + 12198066.

It is an arithmetic number, because the mean of its divisors is an integer number (3341522424240).

Almost surely, 2^{54251666615511} is an apocalyptic number.

54251666615511 is a deficient number, since it is larger than the sum of its proper divisors (25944871566249).

54251666615511 is a wasteful number, since it uses less digits than its factorization.

54251666615511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18553075 (or 18553072 counting only the distinct ones).

The product of its digits is 6480000, while the sum is 54.

The spelling of 54251666615511 in words is "fifty-four trillion, two hundred fifty-one billion, six hundred sixty-six million, six hundred fifteen thousand, five hundred eleven".