15897966120 has 256 divisors, whose sum is σ = 54858988800. Its totient is φ = 4092042240.

The previous prime is 15897966113. The next prime is 15897966131. The reversal of 15897966120 is 2166979851.

15897966120 is a `hidden beast` number, since 15 + 8 + 9 + 7 + 9 + 6 + 612 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 5233242 + ... + 5236278.

It is an arithmetic number, because the mean of its divisors is an integer number (214292925).

Almost surely, 2^15897966120 is an apocalyptic number.

15897966120 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 15897966120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27429494400).

15897966120 is an abundant number, since it is smaller than the sum of its proper divisors (38961022680).

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

15897966120 is a wasteful number, since it uses less digits than its factorization.

15897966120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225 (or 3215 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 15897966120 in words is "fifteen billion, eight hundred ninety-seven million, nine hundred sixty-six thousand, one hundred twenty".