15540235000 has 40 divisors (see below), whose sum is σ = 36410782320. Its totient is φ = 6216092000.

The previous prime is 15540234977. The next prime is 15540235019. The reversal of 15540235000 is 53204551.

It is a tau number, because it is divible by the number of its divisors (40).

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 9 ways as a sum of consecutive naturals, for example, 1549024 + ... + 1559023.

It is an arithmetic number, because the mean of its divisors is an integer number (910269558).

Almost surely, 2^15540235000 is an apocalyptic number.

15540235000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15540235000 is an abundant number, since it is smaller than the sum of its proper divisors (20870547320).

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

15540235000 is an equidigital number, since it uses as much as digits as its factorization.

15540235000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108073 (or 3108054 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 15540235000 its reverse (53204551), we get a palindrome (15593439551).

The spelling of 15540235000 in words is "fifteen billion, five hundred forty million, two hundred thirty-five thousand".