16351587840 has 320 divisors, whose sum is σ = 60342137856. Its totient is φ = 3699965952.

The previous prime is 16351587799. The next prime is 16351587841. The reversal of 16351587840 is 4878515361.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 16351587840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16351587841) 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, 5535804 + ... + 5538756.

Almost surely, 2^16351587840 is an apocalyptic number.

16351587840 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 16351587840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30171068928).

16351587840 is an abundant number, since it is smaller than the sum of its proper divisors (43990550016).

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

16351587840 is a wasteful number, since it uses less digits than its factorization.

16351587840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3089 (or 3073 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 16351587840 in words is "sixteen billion, three hundred fifty-one million, five hundred eighty-seven thousand, eight hundred forty".