15660144740 has 24 divisors (see below), whose sum is σ = 32891822712. Its totient is φ = 6263006720.

The previous prime is 15660144713. The next prime is 15660144781. The reversal of 15660144740 is 4744106651.

15660144740 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 4 ways, for example, as 6195578944 + 9464565796 = 78712^2 + 97286^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15660144694 and 15660144703.

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 7 ways as a sum of consecutive naturals, for example, 62570 + ... + 187710.

It is an arithmetic number, because the mean of its divisors is an integer number (1370492613).

Almost surely, 2^15660144740 is an apocalyptic number.

15660144740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 125140×125141.

It is an amenable number.

15660144740 is an abundant number, since it is smaller than the sum of its proper divisors (17231677972).

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

15660144740 is a wasteful number, since it uses less digits than its factorization.

15660144740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131407 (or 131405 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 15660144740 in words is "fifteen billion, six hundred sixty million, one hundred forty-four thousand, seven hundred forty".