16042736641 has 2 divisors, whose sum is σ = 16042736642. Its totient is φ = 16042736640.

The previous prime is 16042736609. The next prime is 16042736683. The reversal of 16042736641 is 14663724061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12982323600 + 3060413041 = 113940^2 + 55321^2 .

It is a cyclic number.

It is not a de Polignac number, because 16042736641 - 2⁵ = 16042736609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16042736594 and 16042736603.

It is not a weakly prime, because it can be changed into another prime (16042736041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8021368320 + 8021368321.

It is an arithmetic number, because the mean of its divisors is an integer number (8021368321).

Almost surely, 2^16042736641 is an apocalyptic number.

It is an amenable number.

16042736641 is a deficient number, since it is larger than the sum of its proper divisors (1).

16042736641 is an equidigital number, since it uses as much as digits as its factorization.

16042736641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 16042736641 in words is "sixteen billion, forty-two million, seven hundred thirty-six thousand, six hundred forty-one".