781040293259 has 2 divisors, whose sum is σ = 781040293260. Its totient is φ = 781040293258.

The previous prime is 781040293217. The next prime is 781040293261. The reversal of 781040293259 is 952392040187.

781040293259 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 781040293259 - 2⁸ = 781040293003 is a prime.

It is a super-2 number, since 2×781040293259² (a number of 25 digits) contains 22 as substring.

Together with 781040293261, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (781040290259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390520146629 + 390520146630.

It is an arithmetic number, because the mean of its divisors is an integer number (390520146630).

Almost surely, 2^781040293259 is an apocalyptic number.

781040293259 is a deficient number, since it is larger than the sum of its proper divisors (1).

781040293259 is an equidigital number, since it uses as much as digits as its factorization.

781040293259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 781040293259 in words is "seven hundred eighty-one billion, forty million, two hundred ninety-three thousand, two hundred fifty-nine".