15664516120 has 64 divisors (see below), whose sum is σ = 38541484800. Its totient is φ = 5682526080.

The previous prime is 15664516103. The next prime is 15664516121. The reversal of 15664516120 is 2161546651.

It is a self number, because there is not a number n which added to its sum of digits gives 15664516120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15664516121) 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, 141877 + ... + 226843.

It is an arithmetic number, because the mean of its divisors is an integer number (602210700).

Almost surely, 2^15664516120 is an apocalyptic number.

15664516120 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 15664516120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19270742400).

15664516120 is an abundant number, since it is smaller than the sum of its proper divisors (22876968680).

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

15664516120 is a wasteful number, since it uses less digits than its factorization.

15664516120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85408 (or 85404 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 15664516120 in words is "fifteen billion, six hundred sixty-four million, five hundred sixteen thousand, one hundred twenty".