15420473779 has 2 divisors, whose sum is σ = 15420473780. Its totient is φ = 15420473778.

The previous prime is 15420473773. The next prime is 15420473801. The reversal of 15420473779 is 97737402451.

15420473779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15420473779 - 2⁹ = 15420473267 is a prime.

It is not a weakly prime, because it can be changed into another prime (15420473773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7710236889 + 7710236890.

It is an arithmetic number, because the mean of its divisors is an integer number (7710236890).

Almost surely, 2^15420473779 is an apocalyptic number.

15420473779 is a deficient number, since it is larger than the sum of its proper divisors (1).

15420473779 is an equidigital number, since it uses as much as digits as its factorization.

15420473779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1481760, while the sum is 49.

The spelling of 15420473779 in words is "fifteen billion, four hundred twenty million, four hundred seventy-three thousand, seven hundred seventy-nine".