55044653781 has 16 divisors (see below), whose sum is σ = 79561919360. Its totient is φ = 33649300800.

The previous prime is 55044653759. The next prime is 55044653789. The reversal of 55044653781 is 18735644055.

55044653781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55044653781 - 2¹¹ = 55044651733 is a prime.

It is a super-2 number, since 2×55044653781² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55044653781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55044653789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4667626 + ... + 4679403.

It is an arithmetic number, because the mean of its divisors is an integer number (4972619960).

Almost surely, 2^55044653781 is an apocalyptic number.

It is an amenable number.

55044653781 is a deficient number, since it is larger than the sum of its proper divisors (24517265579).

55044653781 is a wasteful number, since it uses less digits than its factorization.

55044653781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9347196.

The product of its (nonzero) digits is 2016000, while the sum is 48.

The spelling of 55044653781 in words is "fifty-five billion, forty-four million, six hundred fifty-three thousand, seven hundred eighty-one".