5091497581631 has 16 divisors (see below), whose sum is σ = 5463157692384. Its totient is φ = 4728007839744.

The previous prime is 5091497581627. The next prime is 5091497581637. The reversal of 5091497581631 is 1361857941905.

It is a cyclic number.

It is not a de Polignac number, because 5091497581631 - 2² = 5091497581627 is a prime.

It is a super-2 number, since 2×5091497581631² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5091497581637) 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, 1315250 + ... + 3451503.

It is an arithmetic number, because the mean of its divisors is an integer number (341447355774).

Almost surely, 2^{5091497581631} is an apocalyptic number.

5091497581631 is a deficient number, since it is larger than the sum of its proper divisors (371660110753).

5091497581631 is a wasteful number, since it uses less digits than its factorization.

5091497581631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4767610.

The product of its (nonzero) digits is 8164800, while the sum is 59.

The spelling of 5091497581631 in words is "five trillion, ninety-one billion, four hundred ninety-seven million, five hundred eighty-one thousand, six hundred thirty-one".