15945690000 has 400 divisors, whose sum is σ = 53997115392. Its totient is φ = 4049472000.

The previous prime is 15945689989. The next prime is 15945690031. The reversal of 15945690000 is 9654951.

It is a tau number, because it is divible by the number of its divisors (400).

It is a super-2 number, since 2×15945690000² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 60629869 + ... + 60630131.

Almost surely, 2^15945690000 is an apocalyptic number.

15945690000 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 15945690000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26998557696).

15945690000 is an abundant number, since it is smaller than the sum of its proper divisors (38051425392).

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

15945690000 is a wasteful number, since it uses less digits than its factorization.

15945690000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 39.

The spelling of 15945690000 in words is "fifteen billion, nine hundred forty-five million, six hundred ninety thousand".