16445332153890 has 64 divisors (see below), whose sum is σ = 44923834206720. Its totient is φ = 4278460394880.

The previous prime is 16445332153853. The next prime is 16445332153891. The reversal of 16445332153890 is 9835123354461.

16445332153890 is a `hidden beast` number, since 1 + 6 + 4 + 4 + 533 + 2 + 15 + 3 + 8 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (16445332153891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 742777194 + ... + 742799333.

It is an arithmetic number, because the mean of its divisors is an integer number (701934909480).

Almost surely, 2^{16445332153890} is an apocalyptic number.

16445332153890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16445332153890 is an abundant number, since it is smaller than the sum of its proper divisors (28478502052830).

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

16445332153890 is a wasteful number, since it uses less digits than its factorization.

16445332153890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485576584 (or 1485576578 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 54.

The spelling of 16445332153890 in words is "sixteen trillion, four hundred forty-five billion, three hundred thirty-two million, one hundred fifty-three thousand, eight hundred ninety".