781947451063 has 2 divisors, whose sum is σ = 781947451064. Its totient is φ = 781947451062.

The previous prime is 781947451039. The next prime is 781947451081. The reversal of 781947451063 is 360154749187.

It is a strong prime.

It is an emirp because it is prime and its reverse (360154749187) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 781947451063 - 2⁹ = 781947450551 is a prime.

It is a super-2 number, since 2×781947451063² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781947450995 and 781947451013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (781947421063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390973725531 + 390973725532.

It is an arithmetic number, because the mean of its divisors is an integer number (390973725532).

Almost surely, 2^781947451063 is an apocalyptic number.

781947451063 is a deficient number, since it is larger than the sum of its proper divisors (1).

781947451063 is an equidigital number, since it uses as much as digits as its factorization.

781947451063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 55.

It can be divided in two parts, 78194 and 7451063, that added together give a palindrome (7529257).

The spelling of 781947451063 in words is "seven hundred eighty-one billion, nine hundred forty-seven million, four hundred fifty-one thousand, sixty-three".