16205261311 has 2 divisors, whose sum is σ = 16205261312. Its totient is φ = 16205261310.

The previous prime is 16205261273. The next prime is 16205261321. The reversal of 16205261311 is 11316250261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16205261311 - 2¹⁹ = 16204737023 is a prime.

It is a super-2 number, since 2×16205261311² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16205261311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16205261321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8102630655 + 8102630656.

It is an arithmetic number, because the mean of its divisors is an integer number (8102630656).

Almost surely, 2^16205261311 is an apocalyptic number.

16205261311 is a deficient number, since it is larger than the sum of its proper divisors (1).

16205261311 is an equidigital number, since it uses as much as digits as its factorization.

16205261311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 16205261311 in words is "sixteen billion, two hundred five million, two hundred sixty-one thousand, three hundred eleven".