15942148388644 has 9 divisors (see below), whose sum is σ = 27898773654801. Its totient is φ = 7971070201560.

The previous prime is 15942148388609. The next prime is 15942148388681. The reversal of 15942148388644 is 44688384124951.

The square root of 15942148388644 is 3992762.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 15678733091044 + 263415297600 = 3959638^2 + 513240^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15942148388644.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6987334 + ... + 8983714.

Almost surely, 2^{15942148388644} is an apocalyptic number.

15942148388644 is the 3992762-nd square number.

It is an amenable number.

15942148388644 is a deficient number, since it is larger than the sum of its proper divisors (11956625266157).

15942148388644 is an frugal number, since it uses more digits than its factorization.

15942148388644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3992766 (or 1996383 counting only the distinct ones).

The product of its digits is 212336640, while the sum is 67.

The spelling of 15942148388644 in words is "fifteen trillion, nine hundred forty-two billion, one hundred forty-eight million, three hundred eighty-eight thousand, six hundred forty-four".