15643492548 has 72 divisors (see below), whose sum is σ = 38819811072. Its totient is φ = 4902084096.

The previous prime is 15643492541. The next prime is 15643492577. The reversal of 15643492548 is 84529434651.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 15643492548.

It is not an unprimeable number, because it can be changed into a prime (15643492541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3788461 + ... + 3792587.

Almost surely, 2^15643492548 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15643492548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19409905536).

15643492548 is an abundant number, since it is smaller than the sum of its proper divisors (23176318524).

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

15643492548 is a wasteful number, since it uses less digits than its factorization.

15643492548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5261 (or 5242 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 51.

The spelling of 15643492548 in words is "fifteen billion, six hundred forty-three million, four hundred ninety-two thousand, five hundred forty-eight".