16742447125 has 8 divisors (see below), whose sum is σ = 20894574168. Its totient is φ = 13393957600.

The previous prime is 16742447107. The next prime is 16742447131. The reversal of 16742447125 is 52174424761.

It can be written as a sum of positive squares in 4 ways, for example, as 4833308484 + 11909138641 = 69522^2 + 109129^2 .

It is not a de Polignac number, because 16742447125 - 2¹⁷ = 16742316053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66969664 + ... + 66969913.

It is an arithmetic number, because the mean of its divisors is an integer number (2611821771).

Almost surely, 2^16742447125 is an apocalyptic number.

It is an amenable number.

16742447125 is a deficient number, since it is larger than the sum of its proper divisors (4152127043).

16742447125 is an equidigital number, since it uses as much as digits as its factorization.

16742447125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133939592 (or 133939582 counting only the distinct ones).

The product of its digits is 376320, while the sum is 43.

The spelling of 16742447125 in words is "sixteen billion, seven hundred forty-two million, four hundred forty-seven thousand, one hundred twenty-five".