15643342420 has 12 divisors (see below), whose sum is σ = 32851019124. Its totient is φ = 6257336960.

The previous prime is 15643342381. The next prime is 15643342471. The reversal of 15643342420 is 2424334651.

15643342420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6164762256 + 9478580164 = 78516^2 + 97358^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391083541 + ... + 391083580.

It is an arithmetic number, because the mean of its divisors is an integer number (2737584927).

Almost surely, 2^15643342420 is an apocalyptic number.

15643342420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15643342420 is an abundant number, since it is smaller than the sum of its proper divisors (17207676704).

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

15643342420 is a wasteful number, since it uses less digits than its factorization.

15643342420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782167130 (or 782167128 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

The spelling of 15643342420 in words is "fifteen billion, six hundred forty-three million, three hundred forty-two thousand, four hundred twenty".