15540200540 has 48 divisors (see below), whose sum is σ = 33685176000. Its totient is φ = 6017628672.

The previous prime is 15540200527. The next prime is 15540200549. The reversal of 15540200540 is 4500204551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15540200549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94496 + ... + 200024.

It is an arithmetic number, because the mean of its divisors is an integer number (701774500).

Almost surely, 2^15540200540 is an apocalyptic number.

15540200540 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 15540200540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16842588000).

15540200540 is an abundant number, since it is smaller than the sum of its proper divisors (18144975460).

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

15540200540 is a wasteful number, since it uses less digits than its factorization.

15540200540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105774 (or 105772 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The spelling of 15540200540 in words is "fifteen billion, five hundred forty million, two hundred thousand, five hundred forty".