15994605312 has 216 divisors, whose sum is σ = 55805664096. Its totient is φ = 4300996608.

The previous prime is 15994605287. The next prime is 15994605349. The reversal of 15994605312 is 21350649951.

15994605312 is a `hidden beast` number, since 1 + 5 + 9 + 9 + 4 + 605 + 31 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 245008 + ... + 303344.

It is an arithmetic number, because the mean of its divisors is an integer number (258359556).

Almost surely, 2^15994605312 is an apocalyptic number.

15994605312 is a gapful number since it is divisible by the number (12) 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 15994605312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27902832048).

15994605312 is an abundant number, since it is smaller than the sum of its proper divisors (39811058784).

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

15994605312 is a wasteful number, since it uses less digits than its factorization.

15994605312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58383 (or 58366 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 15994605312 in words is "fifteen billion, nine hundred ninety-four million, six hundred five thousand, three hundred twelve".