16740443861 has 2 divisors, whose sum is σ = 16740443862. Its totient is φ = 16740443860.

The previous prime is 16740443851. The next prime is 16740443891. The reversal of 16740443861 is 16834404761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8891547025 + 7848896836 = 94295^2 + 88594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16740443861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16740443801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8370221930 + 8370221931.

It is an arithmetic number, because the mean of its divisors is an integer number (8370221931).

Almost surely, 2^16740443861 is an apocalyptic number.

It is an amenable number.

16740443861 is a deficient number, since it is larger than the sum of its proper divisors (1).

16740443861 is an equidigital number, since it uses as much as digits as its factorization.

16740443861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 16740443861 in words is "sixteen billion, seven hundred forty million, four hundred forty-three thousand, eight hundred sixty-one".