15964054861 has 2 divisors, whose sum is σ = 15964054862. Its totient is φ = 15964054860.

The previous prime is 15964054807. The next prime is 15964054949. The reversal of 15964054861 is 16845046951.

It is a happy number.

15964054861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8407056100 + 7556998761 = 91690^2 + 86931^2 .

It is a cyclic number.

It is not a de Polignac number, because 15964054861 - 2¹¹ = 15964052813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15964054801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7982027430 + 7982027431.

It is an arithmetic number, because the mean of its divisors is an integer number (7982027431).

Almost surely, 2^15964054861 is an apocalyptic number.

It is an amenable number.

15964054861 is a deficient number, since it is larger than the sum of its proper divisors (1).

15964054861 is an equidigital number, since it uses as much as digits as its factorization.

15964054861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 15964054861 in words is "fifteen billion, nine hundred sixty-four million, fifty-four thousand, eight hundred sixty-one".