16181489783680 has 128 divisors (see below), whose sum is σ = 42064020573120. Its totient is φ = 5916696772608.

The previous prime is 16181489783663. The next prime is 16181489783699. The reversal of 16181489783680 is 8638798418161.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×16181489783680² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 8584257 + ... + 10298176.

Almost surely, 2^{16181489783680} is an apocalyptic number.

16181489783680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16181489783680 is an abundant number, since it is smaller than the sum of its proper divisors (25882530789440).

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

16181489783680 is a wasteful number, since it uses less digits than its factorization.

16181489783680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18882568 (or 18882556 counting only the distinct ones).

The product of its (nonzero) digits is 111476736, while the sum is 70.

The spelling of 16181489783680 in words is "sixteen trillion, one hundred eighty-one billion, four hundred eighty-nine million, seven hundred eighty-three thousand, six hundred eighty".