15711121667 has 2 divisors, whose sum is σ = 15711121668. Its totient is φ = 15711121666.

The previous prime is 15711121663. The next prime is 15711121703. The reversal of 15711121667 is 76612111751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15711121667 - 2² = 15711121663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15711121667.

It is not a weakly prime, because it can be changed into another prime (15711121661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7855560833 + 7855560834.

It is an arithmetic number, because the mean of its divisors is an integer number (7855560834).

Almost surely, 2^15711121667 is an apocalyptic number.

15711121667 is a deficient number, since it is larger than the sum of its proper divisors (1).

15711121667 is an equidigital number, since it uses as much as digits as its factorization.

15711121667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 38.

The spelling of 15711121667 in words is "fifteen billion, seven hundred eleven million, one hundred twenty-one thousand, six hundred sixty-seven".