15855696811 has 2 divisors, whose sum is σ = 15855696812. Its totient is φ = 15855696810.

The previous prime is 15855696767. The next prime is 15855696853. The reversal of 15855696811 is 11869655851.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15855696811 - 2²¹ = 15853599659 is a prime.

It is not a weakly prime, because it can be changed into another prime (15855696211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7927848405 + 7927848406.

It is an arithmetic number, because the mean of its divisors is an integer number (7927848406).

Almost surely, 2^15855696811 is an apocalyptic number.

15855696811 is a deficient number, since it is larger than the sum of its proper divisors (1).

15855696811 is an equidigital number, since it uses as much as digits as its factorization.

15855696811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592000, while the sum is 55.

The spelling of 15855696811 in words is "fifteen billion, eight hundred fifty-five million, six hundred ninety-six thousand, eight hundred eleven".