55663431154553 has 16 divisors (see below), whose sum is σ = 56673243446160. Its totient is φ = 54662728974336.

The previous prime is 55663431154531. The next prime is 55663431154579. The reversal of 55663431154553 is 35545113436655.

It can be written as a sum of positive squares in 8 ways, for example, as 16322787781609 + 39340643372944 = 4040147^2 + 6272212^2 .

It is a cyclic number.

It is not a de Polignac number, because 55663431154553 - 2⁶ = 55663431154489 is a prime.

It is a super-4 number, since 4×55663431154553⁴ (a number of 56 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55663439154553) 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, 444544151 + ... + 444669347.

It is an arithmetic number, because the mean of its divisors is an integer number (3542077715385).

Almost surely, 2^{55663431154553} is an apocalyptic number.

It is an amenable number.

55663431154553 is a deficient number, since it is larger than the sum of its proper divisors (1009812291607).

55663431154553 is a wasteful number, since it uses less digits than its factorization.

55663431154553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161516.

The product of its digits is 48600000, while the sum is 56.

The spelling of 55663431154553 in words is "fifty-five trillion, six hundred sixty-three billion, four hundred thirty-one million, one hundred fifty-four thousand, five hundred fifty-three".