15134646421 has 2 divisors, whose sum is σ = 15134646422. Its totient is φ = 15134646420.

The previous prime is 15134646407. The next prime is 15134646427. The reversal of 15134646421 is 12464643151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15125556196 + 9090225 = 122986^2 + 3015^2 .

It is a cyclic number.

It is not a de Polignac number, because 15134646421 - 2²⁵ = 15101091989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15134646427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7567323210 + 7567323211.

It is an arithmetic number, because the mean of its divisors is an integer number (7567323211).

Almost surely, 2^15134646421 is an apocalyptic number.

It is an amenable number.

15134646421 is a deficient number, since it is larger than the sum of its proper divisors (1).

15134646421 is an equidigital number, since it uses as much as digits as its factorization.

15134646421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 37.

The spelling of 15134646421 in words is "fifteen billion, one hundred thirty-four million, six hundred forty-six thousand, four hundred twenty-one".