13621163280 has 40 divisors (see below), whose sum is σ = 42225606912. Its totient is φ = 3632310144.

The previous prime is 13621163279. The next prime is 13621163287. The reversal of 13621163280 is 8236112631.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (13621163287) 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, 28377184 + ... + 28377663.

Almost surely, 2^13621163280 is an apocalyptic number.

13621163280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13621163280 is an abundant number, since it is smaller than the sum of its proper divisors (28604443632).

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

13621163280 is a wasteful number, since it uses less digits than its factorization.

13621163280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56754863 (or 56754857 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 13621163280 in words is "thirteen billion, six hundred twenty-one million, one hundred sixty-three thousand, two hundred eighty".