16123615881840 has 120 divisors (see below), whose sum is σ = 54538034394480. Its totient is φ = 4268698278912.

The previous prime is 16123615881761. The next prime is 16123615881847. The reversal of 16123615881840 is 4818851632161.

16123615881840 is a `hidden beast` number, since 1 + 6 + 1 + 2 + 3 + 6 + 1 + 588 + 18 + 40 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16123615881847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80453557 + ... + 80653716.

It is an arithmetic number, because the mean of its divisors is an integer number (454483619954).

Almost surely, 2^{16123615881840} is an apocalyptic number.

16123615881840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16123615881840 is an abundant number, since it is smaller than the sum of its proper divisors (38414418512640).

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

16123615881840 is a wasteful number, since it uses less digits than its factorization.

16123615881840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161107431 (or 161107422 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The spelling of 16123615881840 in words is "sixteen trillion, one hundred twenty-three billion, six hundred fifteen million, eight hundred eighty-one thousand, eight hundred forty".