15550001500 has 96 divisors (see below), whose sum is σ = 37112467392. Its totient is φ = 5644800000.

The previous prime is 15550001497. The next prime is 15550001501. The reversal of 15550001500 is 510005551.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15550001501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3699400 + ... + 3703600.

It is an arithmetic number, because the mean of its divisors is an integer number (386588202).

Almost surely, 2^15550001500 is an apocalyptic number.

15550001500 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 15550001500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18556233696).

15550001500 is an abundant number, since it is smaller than the sum of its proper divisors (21562465892).

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

15550001500 is a wasteful number, since it uses less digits than its factorization.

15550001500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4904 (or 4892 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 22.

The spelling of 15550001500 in words is "fifteen billion, five hundred fifty million, one thousand, five hundred".