15512000000 has 280 divisors, whose sum is σ = 44435993712. Its totient is φ = 5299200000.

The previous prime is 15511999999. The next prime is 15512000011. The reversal of 15512000000 is 21551.

It is a tau number, because it is divible by the number of its divisors (280).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 55999862 + ... + 56000138.

Almost surely, 2^15512000000 is an apocalyptic number.

15512000000 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 15512000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22217996856).

15512000000 is an abundant number, since it is smaller than the sum of its proper divisors (28923993712).

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

15512000000 is an frugal number, since it uses more digits than its factorization.

15512000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

Adding to 15512000000 its reverse (21551), we get a palindrome (15512021551).

The spelling of 15512000000 in words is "fifteen billion, five hundred twelve million", and thus it is an aban number.