781612207328 has 48 divisors (see below), whose sum is σ = 1547885967264. Its totient is φ = 388499950080.

The previous prime is 781612207297. The next prime is 781612207391. The reversal of 781612207328 is 823702216187.

It is a super-2 number, since 2×781612207328² (a number of 25 digits) contains 22 as substring.

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, 16176101 + ... + 16224347.

It is an arithmetic number, because the mean of its divisors is an integer number (32247624318).

Almost surely, 2^781612207328 is an apocalyptic number.

It is an amenable number.

781612207328 is a deficient number, since it is larger than the sum of its proper divisors (766273759936).

781612207328 is a wasteful number, since it uses less digits than its factorization.

781612207328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51235 (or 51227 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 47.

The spelling of 781612207328 in words is "seven hundred eighty-one billion, six hundred twelve million, two hundred seven thousand, three hundred twenty-eight".