781047488568 has 32 divisors (see below), whose sum is σ = 1952642221200. Its totient is φ = 260346029568.

The previous prime is 781047488561. The next prime is 781047488591. The reversal of 781047488568 is 865884740187.

It is a super-2 number, since 2×781047488568² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781047488499 and 781047488508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (781047488561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2735178 + ... + 3007206.

Almost surely, 2^781047488568 is an apocalyptic number.

It is an amenable number.

781047488568 is an abundant number, since it is smaller than the sum of its proper divisors (1171594732632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

781047488568 is a wasteful number, since it uses less digits than its factorization.

781047488568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391671 (or 391667 counting only the distinct ones).

The product of its (nonzero) digits is 96337920, while the sum is 66.

The spelling of 781047488568 in words is "seven hundred eighty-one billion, forty-seven million, four hundred eighty-eight thousand, five hundred sixty-eight".