16451377361591 has 2 divisors, whose sum is σ = 16451377361592. Its totient is φ = 16451377361590.

The previous prime is 16451377361569. The next prime is 16451377361599. The reversal of 16451377361591 is 19516377315461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16451377361591 - 2³⁰ = 16450303619767 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16451377361591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16451377361599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8225688680795 + 8225688680796.

It is an arithmetic number, because the mean of its divisors is an integer number (8225688680796).

Almost surely, 2^{16451377361591} is an apocalyptic number.

16451377361591 is a deficient number, since it is larger than the sum of its proper divisors (1).

16451377361591 is an equidigital number, since it uses as much as digits as its factorization.

16451377361591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14288400, while the sum is 59.

The spelling of 16451377361591 in words is "sixteen trillion, four hundred fifty-one billion, three hundred seventy-seven million, three hundred sixty-one thousand, five hundred ninety-one".