15911343401 has 2 divisors, whose sum is σ = 15911343402. Its totient is φ = 15911343400.

The previous prime is 15911343323. The next prime is 15911343403. The reversal of 15911343401 is 10434311951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9297587776 + 6613755625 = 96424^2 + 81325^2 .

It is a cyclic number.

It is not a de Polignac number, because 15911343401 - 2¹⁴ = 15911327017 is a prime.

Together with 15911343403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15911343403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7955671700 + 7955671701.

It is an arithmetic number, because the mean of its divisors is an integer number (7955671701).

Almost surely, 2^15911343401 is an apocalyptic number.

It is an amenable number.

15911343401 is a deficient number, since it is larger than the sum of its proper divisors (1).

15911343401 is an equidigital number, since it uses as much as digits as its factorization.

15911343401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 15911343401 in words is "fifteen billion, nine hundred eleven million, three hundred forty-three thousand, four hundred one".