15840059968 has 56 divisors (see below), whose sum is σ = 32412115008. Its totient is φ = 7676837376.

The previous prime is 15840059953. The next prime is 15840059969. The reversal of 15840059968 is 86995004851.

It is a super-2 number, since 2×15840059968² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15840059969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253405 + ... + 309667.

It is an arithmetic number, because the mean of its divisors is an integer number (578787768).

Almost surely, 2^15840059968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15840059968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16206057504).

15840059968 is an abundant number, since it is smaller than the sum of its proper divisors (16572055040).

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

15840059968 is an equidigital number, since it uses as much as digits as its factorization.

15840059968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56411 (or 56401 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 55.

The spelling of 15840059968 in words is "fifteen billion, eight hundred forty million, fifty-nine thousand, nine hundred sixty-eight".