13961377990 has 16 divisors (see below), whose sum is σ = 28720549152. Its totient is φ = 4786758144.

The previous prime is 13961377979. The next prime is 13961377999. The reversal of 13961377990 is 9977316931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13961377999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99724059 + ... + 99724198.

It is an arithmetic number, because the mean of its divisors is an integer number (1795034322).

Almost surely, 2^13961377990 is an apocalyptic number.

13961377990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13961377990 is an abundant number, since it is smaller than the sum of its proper divisors (14759171162).

13961377990 is a wasteful number, since it uses less digits than its factorization.

13961377990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199448271.

The product of its (nonzero) digits is 1928934, while the sum is 55.

The spelling of 13961377990 in words is "thirteen billion, nine hundred sixty-one million, three hundred seventy-seven thousand, nine hundred ninety".