13977297648 has 30 divisors (see below), whose sum is σ = 39117020904. Its totient is φ = 4659099168.

The previous prime is 13977297629. The next prime is 13977297667. The reversal of 13977297648 is 84679277931.

It is an interprime number because it is at equal distance from previous prime (13977297629) and next prime (13977297667).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48532140 + ... + 48532427.

Almost surely, 2^13977297648 is an apocalyptic number.

13977297648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13977297648 is an abundant number, since it is smaller than the sum of its proper divisors (25139723256).

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

13977297648 is a wasteful number, since it uses less digits than its factorization.

13977297648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97064581 (or 97064572 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The spelling of 13977297648 in words is "thirteen billion, nine hundred seventy-seven million, two hundred ninety-seven thousand, six hundred forty-eight".