16015899400 has 48 divisors (see below), whose sum is σ = 37246070340. Its totient is φ = 6404793600.

The previous prime is 16015899343. The next prime is 16015899401. The reversal of 16015899400 is 499851061.

It can be written as a sum of positive squares in 6 ways, for example, as 4542490404 + 11473408996 = 67398^2 + 107114^2 .

It is not an unprimeable number, because it can be changed into a prime (16015899401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1157322 + ... + 1171078.

Almost surely, 2^16015899400 is an apocalyptic number.

16015899400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16015899400 is an abundant number, since it is smaller than the sum of its proper divisors (21230170940).

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

16015899400 is a wasteful number, since it uses less digits than its factorization.

16015899400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19594 (or 19585 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 16015899400 in words is "sixteen billion, fifteen million, eight hundred ninety-nine thousand, four hundred".