15981052580 has 48 divisors (see below), whose sum is σ = 34503406896. Its totient is φ = 6213127680.

The previous prime is 15981052573. The next prime is 15981052583. The reversal of 15981052580 is 8525018951.

It can be written as a sum of positive squares in 8 ways, for example, as 1078991104 + 14902061476 = 32848^2 + 122074^2 .

It is not an unprimeable number, because it can be changed into a prime (15981052583) 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, 726950 + ... + 748610.

It is an arithmetic number, because the mean of its divisors is an integer number (718820977).

Almost surely, 2^15981052580 is an apocalyptic number.

15981052580 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 15981052580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17251703448).

15981052580 is an abundant number, since it is smaller than the sum of its proper divisors (18522354316).

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

15981052580 is a wasteful number, since it uses less digits than its factorization.

15981052580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22704 (or 22702 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 44.

The spelling of 15981052580 in words is "fifteen billion, nine hundred eighty-one million, fifty-two thousand, five hundred eighty".