55168945631 has 2 divisors, whose sum is σ = 55168945632. Its totient is φ = 55168945630.

The previous prime is 55168945597. The next prime is 55168945723. The reversal of 55168945631 is 13654986155.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55168945631 - 2¹⁸ = 55168683487 is a prime.

It is a super-2 number, since 2×55168945631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55168944631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27584472815 + 27584472816.

It is an arithmetic number, because the mean of its divisors is an integer number (27584472816).

Almost surely, 2^55168945631 is an apocalyptic number.

55168945631 is a deficient number, since it is larger than the sum of its proper divisors (1).

55168945631 is an equidigital number, since it uses as much as digits as its factorization.

55168945631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888000, while the sum is 53.

The spelling of 55168945631 in words is "fifty-five billion, one hundred sixty-eight million, nine hundred forty-five thousand, six hundred thirty-one".