16261321679 has 2 divisors, whose sum is σ = 16261321680. Its totient is φ = 16261321678.

The previous prime is 16261321621. The next prime is 16261321691. The reversal of 16261321679 is 97612316261.

It is a strong prime.

It is an emirp because it is prime and its reverse (97612316261) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16261321679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16261221679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8130660839 + 8130660840.

It is an arithmetic number, because the mean of its divisors is an integer number (8130660840).

Almost surely, 2^16261321679 is an apocalyptic number.

16261321679 is a deficient number, since it is larger than the sum of its proper divisors (1).

16261321679 is an equidigital number, since it uses as much as digits as its factorization.

16261321679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The spelling of 16261321679 in words is "sixteen billion, two hundred sixty-one million, three hundred twenty-one thousand, six hundred seventy-nine".