5491681097631 has 8 divisors (see below), whose sum is σ = 7478033835264. Its totient is φ = 3583224545880.

The previous prime is 5491681097629. The next prime is 5491681097647. The reversal of 5491681097631 is 1367901861945.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5491681097631 - 2¹ = 5491681097629 is a prime.

It is a super-2 number, since 2×5491681097631² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5491681097131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19474046305 + ... + 19474046586.

It is an arithmetic number, because the mean of its divisors is an integer number (934754229408).

Almost surely, 2^{5491681097631} is an apocalyptic number.

5491681097631 is a deficient number, since it is larger than the sum of its proper divisors (1986352737633).

5491681097631 is a wasteful number, since it uses less digits than its factorization.

5491681097631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38948092941.

The product of its (nonzero) digits is 9797760, while the sum is 60.

The spelling of 5491681097631 in words is "five trillion, four hundred ninety-one billion, six hundred eighty-one million, ninety-seven thousand, six hundred thirty-one".