781053842947 has 4 divisors (see below), whose sum is σ = 892632963376. Its totient is φ = 669474722520.

The previous prime is 781053842927. The next prime is 781053842969. The reversal of 781053842947 is 749248350187.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 781053842947 - 2³⁹ = 231298029059 is a prime.

It is a super-2 number, since 2×781053842947² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781053842891 and 781053842900.

It is not an unprimeable number, because it can be changed into a prime (781053842927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55789560204 + ... + 55789560217.

It is an arithmetic number, because the mean of its divisors is an integer number (223158240844).

Almost surely, 2^781053842947 is an apocalyptic number.

781053842947 is a deficient number, since it is larger than the sum of its proper divisors (111579120429).

781053842947 is a wasteful number, since it uses less digits than its factorization.

781053842947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111579120428.

The product of its (nonzero) digits is 13547520, while the sum is 58.

The spelling of 781053842947 in words is "seven hundred eighty-one billion, fifty-three million, eight hundred forty-two thousand, nine hundred forty-seven".