16555265687400 has 384 divisors, whose sum is σ = 57943691366400. Its totient is φ = 3873251200000.

The previous prime is 16555265687353. The next prime is 16555265687413. The reversal of 16555265687400 is 478656255561.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 449963005 + ... + 449999795.

It is an arithmetic number, because the mean of its divisors is an integer number (150895029600).

Almost surely, 2^{16555265687400} is an apocalyptic number.

16555265687400 is a gapful number since it is divisible by the number (10) 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 16555265687400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28971845683200).

16555265687400 is an abundant number, since it is smaller than the sum of its proper divisors (41388425679000).

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

16555265687400 is a wasteful number, since it uses less digits than its factorization.

16555265687400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39201 (or 39192 counting only the distinct ones).

The product of its (nonzero) digits is 60480000, while the sum is 60.

The spelling of 16555265687400 in words is "sixteen trillion, five hundred fifty-five billion, two hundred sixty-five million, six hundred eighty-seven thousand, four hundred".