15420710549 has 2 divisors, whose sum is σ = 15420710550. Its totient is φ = 15420710548.

The previous prime is 15420710527. The next prime is 15420710563. The reversal of 15420710549 is 94501702451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8695562500 + 6725148049 = 93250^2 + 82007^2 .

It is a cyclic number.

It is not a de Polignac number, because 15420710549 - 2²⁰ = 15419661973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15420770549) 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, 7710355274 + 7710355275.

It is an arithmetic number, because the mean of its divisors is an integer number (7710355275).

Almost surely, 2^15420710549 is an apocalyptic number.

It is an amenable number.

15420710549 is a deficient number, since it is larger than the sum of its proper divisors (1).

15420710549 is an equidigital number, since it uses as much as digits as its factorization.

15420710549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 15420710549 in words is "fifteen billion, four hundred twenty million, seven hundred ten thousand, five hundred forty-nine".