18139758480 has 120 divisors (see below), whose sum is σ = 61511057088. Its totient is φ = 4790285568.

The previous prime is 18139758457. The next prime is 18139758499. The reversal of 18139758480 is 8485793181.

18139758480 is a `hidden beast` number, since 1 + 81 + 39 + 7 + 58 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48142 + ... + 196461.

Almost surely, 2^18139758480 is an apocalyptic number.

18139758480 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 18139758480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30755528544).

18139758480 is an abundant number, since it is smaller than the sum of its proper divisors (43371298608).

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

18139758480 is a wasteful number, since it uses less digits than its factorization.

18139758480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244725 (or 244716 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 18139758480 in words is "eighteen billion, one hundred thirty-nine million, seven hundred fifty-eight thousand, four hundred eighty".