1610744260891 has 2 divisors, whose sum is σ = 1610744260892. Its totient is φ = 1610744260890.

The previous prime is 1610744260877. The next prime is 1610744260907. The reversal of 1610744260891 is 1980624470161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1610744260891 - 2⁹ = 1610744260379 is a prime.

It is a super-2 number, since 2×1610744260891² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1610744260691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805372130445 + 805372130446.

It is an arithmetic number, because the mean of its divisors is an integer number (805372130446).

Almost surely, 2^{1610744260891} is an apocalyptic number.

1610744260891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1610744260891 is an equidigital number, since it uses as much as digits as its factorization.

1610744260891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 1610744260891 in words is "one trillion, six hundred ten billion, seven hundred forty-four million, two hundred sixty thousand, eight hundred ninety-one".