16545720474612 has 432 divisors, whose sum is σ = 50094220176000. Its totient is φ = 4588717754880.

The previous prime is 16545720474601. The next prime is 16545720474623. The reversal of 16545720474612 is 21647402754561.

16545720474612 is a `hidden beast` number, since 1 + 6 + 5 + 4 + 572 + 0 + 4 + 7 + 4 + 61 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (16545720474601) and next prime (16545720474623).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 9503572062 + ... + 9503573802.

It is an arithmetic number, because the mean of its divisors is an integer number (115958843000).

Almost surely, 2^{16545720474612} is an apocalyptic number.

16545720474612 is a gapful number since it is divisible by the number (12) 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 16545720474612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25047110088000).

16545720474612 is an abundant number, since it is smaller than the sum of its proper divisors (33548499701388).

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

16545720474612 is a wasteful number, since it uses less digits than its factorization.

16545720474612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516 (or 2504 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 54.

The spelling of 16545720474612 in words is "sixteen trillion, five hundred forty-five billion, seven hundred twenty million, four hundred seventy-four thousand, six hundred twelve".