13637671940 has 12 divisors (see below), whose sum is σ = 28639111116. Its totient is φ = 5455068768.

The previous prime is 13637671919. The next prime is 13637671963. The reversal of 13637671940 is 4917673631.

It can be written as a sum of positive squares in 2 ways, for example, as 3115425856 + 10522246084 = 55816^2 + 102578^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340941779 + ... + 340941818.

It is an arithmetic number, because the mean of its divisors is an integer number (2386592593).

Almost surely, 2^13637671940 is an apocalyptic number.

13637671940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13637671940 is an abundant number, since it is smaller than the sum of its proper divisors (15001439176).

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

13637671940 is a wasteful number, since it uses less digits than its factorization.

13637671940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681883606 (or 681883604 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 47.

The spelling of 13637671940 in words is "thirteen billion, six hundred thirty-seven million, six hundred seventy-one thousand, nine hundred forty".