55331149581 has 24 divisors (see below), whose sum is σ = 81060901376. Its totient is φ = 36365358240.

The previous prime is 55331149571. The next prime is 55331149589. The reversal of 55331149581 is 18594113355.

55331149581 is a `hidden beast` number, since 5 + 53 + 3 + 1 + 14 + 9 + 581 = 666.

It is not a de Polignac number, because 55331149581 - 2¹⁰ = 55331148557 is a prime.

It is a super-2 number, since 2×55331149581² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55331149589) 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, 72891 + ... + 340551.

Almost surely, 2^55331149581 is an apocalyptic number.

It is an amenable number.

55331149581 is a deficient number, since it is larger than the sum of its proper divisors (25729751795).

55331149581 is a wasteful number, since it uses less digits than its factorization.

55331149581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267993 (or 267990 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The spelling of 55331149581 in words is "fifty-five billion, three hundred thirty-one million, one hundred forty-nine thousand, five hundred eighty-one".