554991616631 has 2 divisors, whose sum is σ = 554991616632. Its totient is φ = 554991616630.

The previous prime is 554991616607. The next prime is 554991616639. The reversal of 554991616631 is 136616199455.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 554991616631 - 2¹⁸ = 554991354487 is a prime.

It is a super-2 number, since 2×554991616631² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (554991616639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277495808315 + 277495808316.

It is an arithmetic number, because the mean of its divisors is an integer number (277495808316).

Almost surely, 2^554991616631 is an apocalyptic number.

554991616631 is a deficient number, since it is larger than the sum of its proper divisors (1).

554991616631 is an equidigital number, since it uses as much as digits as its factorization.

554991616631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5248800, while the sum is 56.

The spelling of 554991616631 in words is "five hundred fifty-four billion, nine hundred ninety-one million, six hundred sixteen thousand, six hundred thirty-one".