15946150681 has 2 divisors, whose sum is σ = 15946150682. Its totient is φ = 15946150680.

The previous prime is 15946150679. The next prime is 15946150709. The reversal of 15946150681 is 18605164951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12658275081 + 3287875600 = 112509^2 + 57340^2 .

It is a cyclic number.

It is not a de Polignac number, because 15946150681 - 2¹ = 15946150679 is a prime.

It is a super-2 number, since 2×15946150681² (a number of 21 digits) contains 22 as substring.

Together with 15946150679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (15946150981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7973075340 + 7973075341.

It is an arithmetic number, because the mean of its divisors is an integer number (7973075341).

Almost surely, 2^15946150681 is an apocalyptic number.

It is an amenable number.

15946150681 is a deficient number, since it is larger than the sum of its proper divisors (1).

15946150681 is an equidigital number, since it uses as much as digits as its factorization.

15946150681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 46.

The spelling of 15946150681 in words is "fifteen billion, nine hundred forty-six million, one hundred fifty thousand, six hundred eighty-one".