637421357316 has 96 divisors (see below), whose sum is σ = 1561798022400. Its totient is φ = 202060131840.

The previous prime is 637421357299. The next prime is 637421357323. The reversal of 637421357316 is 613753124736.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26400786 + ... + 26424918.

It is an arithmetic number, because the mean of its divisors is an integer number (16268729400).

Almost surely, 2^637421357316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 637421357316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780899011200).

637421357316 is an abundant number, since it is smaller than the sum of its proper divisors (924376665084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

637421357316 is a wasteful number, since it uses less digits than its factorization.

637421357316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25309 (or 25307 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 48.

The spelling of 637421357316 in words is "six hundred thirty-seven billion, four hundred twenty-one million, three hundred fifty-seven thousand, three hundred sixteen".