15543345552 has 80 divisors (see below), whose sum is σ = 45904776192. Its totient is φ = 4439514240.

The previous prime is 15543345551. The next prime is 15543345553. The reversal of 15543345552 is 25554334551.

It is an interprime number because it is at equal distance from previous prime (15543345551) and next prime (15543345553).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (15543345551) 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, 1448527 + ... + 1459217.

Almost surely, 2^15543345552 is an apocalyptic number.

15543345552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15543345552 is an abundant number, since it is smaller than the sum of its proper divisors (30361430640).

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

15543345552 is a wasteful number, since it uses less digits than its factorization.

15543345552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15036 (or 15030 counting only the distinct ones).

The product of its digits is 900000, while the sum is 42.

The spelling of 15543345552 in words is "fifteen billion, five hundred forty-three million, three hundred forty-five thousand, five hundred fifty-two".