11554166514465 has 72 divisors (see below), whose sum is σ = 20721431053440. Its totient is φ = 5954763806784.

The previous prime is 11554166514437. The next prime is 11554166514487. The reversal of 11554166514465 is 56441566145511.

11554166514465 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 4 + 1 + 66 + 514 + 4 + 65 = 666.

It is not a de Polignac number, because 11554166514465 - 2⁵ = 11554166514433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7117342 + ... + 8588648.

It is an arithmetic number, because the mean of its divisors is an integer number (287797653520).

Almost surely, 2^{11554166514465} is an apocalyptic number.

11554166514465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11554166514465 is a deficient number, since it is larger than the sum of its proper divisors (9167264538975).

11554166514465 is a wasteful number, since it uses less digits than its factorization.

11554166514465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471491 (or 1471441 counting only the distinct ones).

The product of its digits is 8640000, while the sum is 54.

The spelling of 11554166514465 in words is "eleven trillion, five hundred fifty-four billion, one hundred sixty-six million, five hundred fourteen thousand, four hundred sixty-five".