15543240120 has 64 divisors (see below), whose sum is σ = 51810804000. Its totient is φ = 4144863744.

The previous prime is 15543240109. The next prime is 15543240137. The reversal of 15543240120 is 2104234551.

It is a super-2 number, since 2×15543240120² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7194865 + ... + 7197024.

Almost surely, 2^15543240120 is an apocalyptic number.

15543240120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15543240120 is an abundant number, since it is smaller than the sum of its proper divisors (36267563880).

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

15543240120 is a wasteful number, since it uses less digits than its factorization.

15543240120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14391909 (or 14391899 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 15543240120 its reverse (2104234551), we get a palindrome (17647474671).

The spelling of 15543240120 in words is "fifteen billion, five hundred forty-three million, two hundred forty thousand, one hundred twenty".