63727138840 has 32 divisors (see below), whose sum is σ = 144178266960. Its totient is φ = 25350019200.

The previous prime is 63727138817. The next prime is 63727138877. The reversal of 63727138840 is 4883172736.

It is a happy number.

It is a super-2 number, since 2×63727138840² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4393806 + ... + 4408285.

Almost surely, 2^63727138840 is an apocalyptic number.

It is an amenable number.

63727138840 is an abundant number, since it is smaller than the sum of its proper divisors (80451128120).

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

63727138840 is a wasteful number, since it uses less digits than its factorization.

63727138840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8802283 (or 8802279 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 49.

The spelling of 63727138840 in words is "sixty-three billion, seven hundred twenty-seven million, one hundred thirty-eight thousand, eight hundred forty".