16245621504 has 432 divisors, whose sum is σ = 55684283200. Its totient is φ = 4551966720.

The previous prime is 16245621479. The next prime is 16245621527. The reversal of 16245621504 is 40512654261.

16245621504 is a `hidden beast` number, since 1 + 6 + 24 + 5 + 621 + 5 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48206424 + ... + 48206760.

Almost surely, 2^16245621504 is an apocalyptic number.

16245621504 is a gapful number since it is divisible by the number (14) 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 16245621504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27842141600).

16245621504 is an abundant number, since it is smaller than the sum of its proper divisors (39438661696).

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

16245621504 is an equidigital number, since it uses as much as digits as its factorization.

16245621504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 16245621504 in words is "sixteen billion, two hundred forty-five million, six hundred twenty-one thousand, five hundred four".