856415900293 has 2 divisors, whose sum is σ = 856415900294. Its totient is φ = 856415900292.

The previous prime is 856415900267. The next prime is 856415900339. The reversal of 856415900293 is 392009514658.

856415900293 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 can be written as a sum of positive squares in only one way, i.e., 560412440449 + 296003459844 = 748607^2 + 544062^2 .

It is a cyclic number.

It is not a de Polignac number, because 856415900293 - 2⁵ = 856415900261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 856415900293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856415900233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428207950146 + 428207950147.

It is an arithmetic number, because the mean of its divisors is an integer number (428207950147).

Almost surely, 2^856415900293 is an apocalyptic number.

It is an amenable number.

856415900293 is a deficient number, since it is larger than the sum of its proper divisors (1).

856415900293 is an equidigital number, since it uses as much as digits as its factorization.

856415900293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 52.

The spelling of 856415900293 in words is "eight hundred fifty-six billion, four hundred fifteen million, nine hundred thousand, two hundred ninety-three".