7156812421903 has 2 divisors, whose sum is σ = 7156812421904. Its totient is φ = 7156812421902.

The previous prime is 7156812421897. The next prime is 7156812421921. The reversal of 7156812421903 is 3091242186517.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7156812421903 - 2⁹ = 7156812421391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7156812421403) 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, 3578406210951 + 3578406210952.

It is an arithmetic number, because the mean of its divisors is an integer number (3578406210952).

It is a 1-persistent number, because it is pandigital, but 2⋅7156812421903 = 14313624843806 is not.

Almost surely, 2^{7156812421903} is an apocalyptic number.

7156812421903 is a deficient number, since it is larger than the sum of its proper divisors (1).

7156812421903 is an equidigital number, since it uses as much as digits as its factorization.

7156812421903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 7156812421903 in words is "seven trillion, one hundred fifty-six billion, eight hundred twelve million, four hundred twenty-one thousand, nine hundred three".