15520520000 has 140 divisors (see below), whose sum is σ = 39217349556. Its totient is φ = 6090240000.

The previous prime is 15520519969. The next prime is 15520520009. The reversal of 15520520000 is 2502551.

It can be written as a sum of positive squares in 10 ways, for example, as 14703017536 + 817502464 = 121256^2 + 28592^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15520520009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2116340 + ... + 2123660.

Almost surely, 2^15520520000 is an apocalyptic number.

15520520000 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 15520520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19608674778).

15520520000 is an abundant number, since it is smaller than the sum of its proper divisors (23696829556).

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

15520520000 is an frugal number, since it uses more digits than its factorization.

15520520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7406 (or 7381 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The spelling of 15520520000 in words is "fifteen billion, five hundred twenty million, five hundred twenty thousand".