15820434141461 has 2 divisors, whose sum is σ = 15820434141462. Its totient is φ = 15820434141460.

The previous prime is 15820434141439. The next prime is 15820434141569. The reversal of 15820434141461 is 16414143402851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10590019401361 + 5230414740100 = 3254231^2 + 2287010^2 .

It is an emirp because it is prime and its reverse (16414143402851) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15820434141461 is a prime.

It is a super-2 number, since 2×15820434141461² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15820434140461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7910217070730 + 7910217070731.

It is an arithmetic number, because the mean of its divisors is an integer number (7910217070731).

Almost surely, 2^{15820434141461} is an apocalyptic number.

It is an amenable number.

15820434141461 is a deficient number, since it is larger than the sum of its proper divisors (1).

15820434141461 is an equidigital number, since it uses as much as digits as its factorization.

15820434141461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 368640, while the sum is 44.

The spelling of 15820434141461 in words is "fifteen trillion, eight hundred twenty billion, four hundred thirty-four million, one hundred forty-one thousand, four hundred sixty-one".