18080615280 has 160 divisors (see below), whose sum is σ = 68984584704. Its totient is φ = 3814806528.

The previous prime is 18080615279. The next prime is 18080615339. The reversal of 18080615280 is 8251608081.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 392094 + ... + 435773.

Almost surely, 2^18080615280 is an apocalyptic number.

18080615280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18080615280 is an abundant number, since it is smaller than the sum of its proper divisors (50903969424).

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

18080615280 is a wasteful number, since it uses less digits than its factorization.

18080615280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827903 (or 827897 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 39.

The spelling of 18080615280 in words is "eighteen billion, eighty million, six hundred fifteen thousand, two hundred eighty".