15347729640 has 128 divisors (see below), whose sum is σ = 46350921600. Its totient is φ = 4065484800.

The previous prime is 15347729627. The next prime is 15347729651. The reversal of 15347729640 is 4692774351.

15347729640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 15347729640.

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 31 ways as a sum of consecutive naturals, for example, 15061051 + ... + 15062069.

It is an arithmetic number, because the mean of its divisors is an integer number (362116575).

Almost surely, 2^15347729640 is an apocalyptic number.

15347729640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15347729640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23175460800).

15347729640 is an abundant number, since it is smaller than the sum of its proper divisors (31003191960).

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

15347729640 is a wasteful number, since it uses less digits than its factorization.

15347729640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747 (or 1743 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 15347729640 in words is "fifteen billion, three hundred forty-seven million, seven hundred twenty-nine thousand, six hundred forty".