15834434897 has 2 divisors, whose sum is σ = 15834434898. Its totient is φ = 15834434896.

The previous prime is 15834434887. The next prime is 15834434953. The reversal of 15834434897 is 79843443851.

It is an a-pointer prime, because the next prime (15834434953) can be obtained adding 15834434897 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12913140496 + 2921294401 = 113636^2 + 54049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15834434897 is a prime.

It is not a weakly prime, because it can be changed into another prime (15834434887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7917217448 + 7917217449.

It is an arithmetic number, because the mean of its divisors is an integer number (7917217449).

Almost surely, 2^15834434897 is an apocalyptic number.

It is an amenable number.

15834434897 is a deficient number, since it is larger than the sum of its proper divisors (1).

15834434897 is an equidigital number, since it uses as much as digits as its factorization.

15834434897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11612160, while the sum is 56.

The spelling of 15834434897 in words is "fifteen billion, eight hundred thirty-four million, four hundred thirty-four thousand, eight hundred ninety-seven".