781041341863 has 2 divisors, whose sum is σ = 781041341864. Its totient is φ = 781041341862.

The previous prime is 781041341789. The next prime is 781041341923. The reversal of 781041341863 is 368143140187.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-781041341863 is a prime.

It is a super-2 number, since 2×781041341863² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (781041341963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390520670931 + 390520670932.

It is an arithmetic number, because the mean of its divisors is an integer number (390520670932).

Almost surely, 2^781041341863 is an apocalyptic number.

781041341863 is a deficient number, since it is larger than the sum of its proper divisors (1).

781041341863 is an equidigital number, since it uses as much as digits as its factorization.

781041341863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 781041341863 in words is "seven hundred eighty-one billion, forty-one million, three hundred forty-one thousand, eight hundred sixty-three".