15540163240 has 64 divisors (see below), whose sum is σ = 39974284800. Its totient is φ = 5326207488.

The previous prime is 15540163217. The next prime is 15540163241. The reversal of 15540163240 is 4236104551.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (15540163241) 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, 980257 + ... + 995983.

It is an arithmetic number, because the mean of its divisors is an integer number (624598200).

Almost surely, 2^15540163240 is an apocalyptic number.

15540163240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15540163240 is an abundant number, since it is smaller than the sum of its proper divisors (24434121560).

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

15540163240 is a wasteful number, since it uses less digits than its factorization.

15540163240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19274 (or 19270 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 15540163240 its reverse (4236104551), we get a palindrome (19776267791).

The spelling of 15540163240 in words is "fifteen billion, five hundred forty million, one hundred sixty-three thousand, two hundred forty".