16441265151781 has 2 divisors, whose sum is σ = 16441265151782. Its totient is φ = 16441265151780.

The previous prime is 16441265151691. The next prime is 16441265151809. The reversal of 16441265151781 is 18715156214461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14034081871681 + 2407183280100 = 3746209^2 + 1551510^2 .

It is a cyclic number.

It is not a de Polignac number, because 16441265151781 - 2³⁵ = 16406905413413 is a prime.

It is a super-3 number, since 3×16441265151781³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16441265155781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8220632575890 + 8220632575891.

It is an arithmetic number, because the mean of its divisors is an integer number (8220632575891).

Almost surely, 2^{16441265151781} is an apocalyptic number.

It is an amenable number.

16441265151781 is a deficient number, since it is larger than the sum of its proper divisors (1).

16441265151781 is an equidigital number, since it uses as much as digits as its factorization.

16441265151781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1612800, while the sum is 52.

The spelling of 16441265151781 in words is "sixteen trillion, four hundred forty-one billion, two hundred sixty-five million, one hundred fifty-one thousand, seven hundred eighty-one".