15005405500 has 192 divisors, whose sum is σ = 35079722496. Its totient is φ = 5598720000.

The previous prime is 15005405491. The next prime is 15005405561. The reversal of 15005405500 is 550450051.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55370365 + ... + 55370635.

It is an arithmetic number, because the mean of its divisors is an integer number (182706888).

Almost surely, 2^15005405500 is an apocalyptic number.

15005405500 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 15005405500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17539861248).

15005405500 is an abundant number, since it is smaller than the sum of its proper divisors (20074316996).

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

15005405500 is a wasteful number, since it uses less digits than its factorization.

15005405500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

Adding to 15005405500 its reverse (550450051), we get a palindrome (15555855551).

The spelling of 15005405500 in words is "fifteen billion, five million, four hundred five thousand, five hundred".