14991605980 has 192 divisors, whose sum is σ = 36139364352. Its totient is φ = 5185797120.

The previous prime is 14991605953. The next prime is 14991605989. The reversal of 14991605980 is 8950619941.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14991605989) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32101707 + ... + 32102173.

It is an arithmetic number, because the mean of its divisors is an integer number (188225856).

Almost surely, 2^14991605980 is an apocalyptic number.

14991605980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 14991605980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18069682176).

14991605980 is an abundant number, since it is smaller than the sum of its proper divisors (21147758372).

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

14991605980 is a wasteful number, since it uses less digits than its factorization.

14991605980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 52.

The spelling of 14991605980 in words is "fourteen billion, nine hundred ninety-one million, six hundred five thousand, nine hundred eighty".