15681965480 has 64 divisors (see below), whose sum is σ = 36065399040. Its totient is φ = 6134171392.

The previous prime is 15681965479. The next prime is 15681965491. The reversal of 15681965480 is 8456918651.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2860502 + ... + 2865978.

It is an arithmetic number, because the mean of its divisors is an integer number (563521860).

Almost surely, 2^15681965480 is an apocalyptic number.

15681965480 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 15681965480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18032699520).

15681965480 is an abundant number, since it is smaller than the sum of its proper divisors (20383433560).

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

15681965480 is a wasteful number, since it uses less digits than its factorization.

15681965480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7058 (or 7054 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 53.

The spelling of 15681965480 in words is "fifteen billion, six hundred eighty-one million, nine hundred sixty-five thousand, four hundred eighty".