15896454040 has 64 divisors (see below), whose sum is σ = 37075968000. Its totient is φ = 6127605120.

The previous prime is 15896454029. The next prime is 15896454043. The reversal of 15896454040 is 4045469851.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15896454043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269541 + ... + 323179.

It is an arithmetic number, because the mean of its divisors is an integer number (579312000).

Almost surely, 2^15896454040 is an apocalyptic number.

15896454040 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 15896454040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18537984000).

15896454040 is an abundant number, since it is smaller than the sum of its proper divisors (21179513960).

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

15896454040 is a wasteful number, since it uses less digits than its factorization.

15896454040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53920 (or 53916 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 15896454040 in words is "fifteen billion, eight hundred ninety-six million, four hundred fifty-four thousand, forty".