637116881 has 8 divisors (see below), whose sum is σ = 650717760. Its totient is φ = 623657232.

The previous prime is 637116839. The next prime is 637116899. The reversal of 637116881 is 188611736.

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

It is a cyclic number.

It is not a de Polignac number, because 637116881 - 2⁶ = 637116817 is a prime.

It is a super-2 number, since 2×637116881² = 811835840110336322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (637116811) 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, 26165 + ... + 44258.

It is an arithmetic number, because the mean of its divisors is an integer number (81339720).

Almost surely, 2^637116881 is an apocalyptic number.

It is an amenable number.

637116881 is a deficient number, since it is larger than the sum of its proper divisors (13600879).

637116881 is a wasteful number, since it uses less digits than its factorization.

637116881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70615.

The product of its digits is 48384, while the sum is 41.

The square root of 637116881 is about 25241.1743189575. The cubic root of 637116881 is about 860.4778671938.

The spelling of 637116881 in words is "six hundred thirty-seven million, one hundred sixteen thousand, eight hundred eighty-one".