15580844490 has 64 divisors (see below), whose sum is σ = 38256261120. Its totient is φ = 4059935040.

The previous prime is 15580844459. The next prime is 15580844491. The reversal of 15580844490 is 9444808551.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15580844491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 269235 + ... + 321945.

It is an arithmetic number, because the mean of its divisors is an integer number (597754080).

Almost surely, 2^15580844490 is an apocalyptic number.

15580844490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15580844490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19128130560).

15580844490 is an abundant number, since it is smaller than the sum of its proper divisors (22675416630).

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

15580844490 is a wasteful number, since it uses less digits than its factorization.

15580844490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52947.

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 15580844490 in words is "fifteen billion, five hundred eighty million, eight hundred forty-four thousand, four hundred ninety".