15915226643 has 2 divisors, whose sum is σ = 15915226644. Its totient is φ = 15915226642.

The previous prime is 15915226573. The next prime is 15915226661. The reversal of 15915226643 is 34662251951.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15915226643 - 2¹⁰ = 15915225619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15915226594 and 15915226603.

It is not a weakly prime, because it can be changed into another prime (15915226673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7957613321 + 7957613322.

It is an arithmetic number, because the mean of its divisors is an integer number (7957613322).

Almost surely, 2^15915226643 is an apocalyptic number.

15915226643 is a deficient number, since it is larger than the sum of its proper divisors (1).

15915226643 is an equidigital number, since it uses as much as digits as its factorization.

15915226643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 44.

The spelling of 15915226643 in words is "fifteen billion, nine hundred fifteen million, two hundred twenty-six thousand, six hundred forty-three".