15992845440 has 512 divisors, whose sum is σ = 61854105600. Its totient is φ = 3461529600.

The previous prime is 15992845439. The next prime is 15992845447. The reversal of 15992845440 is 4454829951.

It is a happy number.

It is a super-2 number, since 2×15992845440² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15992845447) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8510421 + ... + 8512299.

It is an arithmetic number, because the mean of its divisors is an integer number (120808800).

Almost surely, 2^15992845440 is an apocalyptic number.

15992845440 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 15992845440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30927052800).

15992845440 is an abundant number, since it is smaller than the sum of its proper divisors (45861260160).

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

15992845440 is a wasteful number, since it uses less digits than its factorization.

15992845440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956 (or 1944 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 15992845440 in words is "fifteen billion, nine hundred ninety-two million, eight hundred forty-five thousand, four hundred forty".