16260491881 has 2 divisors, whose sum is σ = 16260491882. Its totient is φ = 16260491880.

The previous prime is 16260491879. The next prime is 16260491887. The reversal of 16260491881 is 18819406261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14875461225 + 1385030656 = 121965^2 + 37216^2 .

It is a cyclic number.

It is not a de Polignac number, because 16260491881 - 2¹ = 16260491879 is a prime.

It is a super-2 number, since 2×16260491881² (a number of 21 digits) contains 22 as substring.

Together with 16260491879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16260491887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8130245940 + 8130245941.

It is an arithmetic number, because the mean of its divisors is an integer number (8130245941).

Almost surely, 2^16260491881 is an apocalyptic number.

It is an amenable number.

16260491881 is a deficient number, since it is larger than the sum of its proper divisors (1).

16260491881 is an equidigital number, since it uses as much as digits as its factorization.

16260491881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 46.

The spelling of 16260491881 in words is "sixteen billion, two hundred sixty million, four hundred ninety-one thousand, eight hundred eighty-one".