16726616891 has 2 divisors, whose sum is σ = 16726616892. Its totient is φ = 16726616890.

The previous prime is 16726616869. The next prime is 16726616911. The reversal of 16726616891 is 19861662761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16726616891 - 2¹⁴ = 16726600507 is a prime.

It is not a weakly prime, because it can be changed into another prime (16726636891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8363308445 + 8363308446.

It is an arithmetic number, because the mean of its divisors is an integer number (8363308446).

Almost surely, 2^16726616891 is an apocalyptic number.

16726616891 is a deficient number, since it is larger than the sum of its proper divisors (1).

16726616891 is an equidigital number, since it uses as much as digits as its factorization.

16726616891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The spelling of 16726616891 in words is "sixteen billion, seven hundred twenty-six million, six hundred sixteen thousand, eight hundred ninety-one".