13421551680 has 672 divisors, whose sum is σ = 52037406720. Its totient is φ = 3158507520.

The previous prime is 13421551667. The next prime is 13421551699. The reversal of 13421551680 is 8615512431.

13421551680 is a `hidden beast` number, since 1 + 3 + 4 + 21 + 551 + 6 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 56157001 + ... + 56157239.

Almost surely, 2^13421551680 is an apocalyptic number.

13421551680 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 13421551680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26018703360).

13421551680 is an abundant number, since it is smaller than the sum of its proper divisors (38615855040).

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

13421551680 is a wasteful number, since it uses less digits than its factorization.

13421551680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 13421551680 in words is "thirteen billion, four hundred twenty-one million, five hundred fifty-one thousand, six hundred eighty".