18778730160 has 80 divisors (see below), whose sum is σ = 58515835104. Its totient is φ = 4981702656.

The previous prime is 18778730149. The next prime is 18778730177. The reversal of 18778730160 is 6103787781.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156387 + ... + 249026.

Almost surely, 2^18778730160 is an apocalyptic number.

18778730160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18778730160 is an abundant number, since it is smaller than the sum of its proper divisors (39737104944).

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

18778730160 is a wasteful number, since it uses less digits than its factorization.

18778730160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405622 (or 405616 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 48.

The spelling of 18778730160 in words is "eighteen billion, seven hundred seventy-eight million, seven hundred thirty thousand, one hundred sixty".