781582641896 has 16 divisors (see below), whose sum is σ = 1674819947040. Its totient is φ = 334963989360.

The previous prime is 781582641881. The next prime is 781582641913. The reversal of 781582641896 is 698146285187.

It is a super-2 number, since 2×781582641896² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6978416390 + ... + 6978416501.

It is an arithmetic number, because the mean of its divisors is an integer number (104676246690).

Almost surely, 2^781582641896 is an apocalyptic number.

It is an amenable number.

781582641896 is an abundant number, since it is smaller than the sum of its proper divisors (893237305144).

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

781582641896 is a wasteful number, since it uses less digits than its factorization.

781582641896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13956832904 (or 13956832900 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 65.

The spelling of 781582641896 in words is "seven hundred eighty-one billion, five hundred eighty-two million, six hundred forty-one thousand, eight hundred ninety-six".