55229964381 has 24 divisors (see below), whose sum is σ = 80141823320. Its totient is φ = 36651678336.

The previous prime is 55229964319. The next prime is 55229964397. The reversal of 55229964381 is 18346992255.

55229964381 is a `hidden beast` number, since 552 + 2 + 9 + 9 + 6 + 4 + 3 + 81 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 22407395481 + 32822568900 = 149691^2 + 181170^2 .

It is not a de Polignac number, because 55229964381 - 2¹⁵ = 55229931613 is a prime.

It is a super-2 number, since 2×55229964381² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) 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 (55229964301) 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, 2714715 + ... + 2734983.

Almost surely, 2^55229964381 is an apocalyptic number.

It is an amenable number.

55229964381 is a deficient number, since it is larger than the sum of its proper divisors (24911858939).

55229964381 is a wasteful number, since it uses less digits than its factorization.

55229964381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21645 (or 21642 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The spelling of 55229964381 in words is "fifty-five billion, two hundred twenty-nine million, nine hundred sixty-four thousand, three hundred eighty-one".