55124981681 has 24 divisors (see below), whose sum is σ = 69689148480. Its totient is φ = 42680832480.

The previous prime is 55124981671. The next prime is 55124981687. The reversal of 55124981681 is 18618942155.

It is a de Polignac number, because none of the positive numbers 2^k-55124981681 is a prime.

It is a super-3 number, since 3×55124981681³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55124981687) 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, 74291 + ... + 340248.

It is an arithmetic number, because the mean of its divisors is an integer number (2903714520).

Almost surely, 2^55124981681 is an apocalyptic number.

It is an amenable number.

55124981681 is a deficient number, since it is larger than the sum of its proper divisors (14564166799).

55124981681 is a wasteful number, since it uses less digits than its factorization.

55124981681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414725 (or 414714 counting only the distinct ones).

The product of its digits is 691200, while the sum is 50.

The spelling of 55124981681 in words is "fifty-five billion, one hundred twenty-four million, nine hundred eighty-one thousand, six hundred eighty-one".