781008510872 has 32 divisors (see below), whose sum is σ = 1468131194880. Its totient is φ = 389507285280.

The previous prime is 781008510859. The next prime is 781008511021. The reversal of 781008510872 is 278015800187.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16191863 + ... + 16240025.

It is an arithmetic number, because the mean of its divisors is an integer number (45879099840).

Almost surely, 2^781008510872 is an apocalyptic number.

It is an amenable number.

781008510872 is a deficient number, since it is larger than the sum of its proper divisors (687122684008).

781008510872 is a wasteful number, since it uses less digits than its factorization.

781008510872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53303 (or 53299 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 47.

The spelling of 781008510872 in words is "seven hundred eighty-one billion, eight million, five hundred ten thousand, eight hundred seventy-two".