13978808638950 has 48 divisors (see below), whose sum is σ = 36174725669376. Its totient is φ = 3565609159200.

The previous prime is 13978808638943. The next prime is 13978808638961. The reversal of 13978808638950 is 5983680887931.

It is a Harshad number since it is a multiple of its sum of digits (75).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2025910846 + ... + 2025917745.

It is an arithmetic number, because the mean of its divisors is an integer number (753640118112).

Almost surely, 2^{13978808638950} is an apocalyptic number.

13978808638950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13978808638950 is an abundant number, since it is smaller than the sum of its proper divisors (22195917030426).

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

13978808638950 is a wasteful number, since it uses less digits than its factorization.

13978808638950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4051828629 (or 4051828624 counting only the distinct ones).

The product of its (nonzero) digits is 627056640, while the sum is 75.

The spelling of 13978808638950 in words is "thirteen trillion, nine hundred seventy-eight billion, eight hundred eight million, six hundred thirty-eight thousand, nine hundred fifty".