783217122872 has 8 divisors (see below), whose sum is σ = 1468532105400. Its totient is φ = 391608561432.

The previous prime is 783217122847. The next prime is 783217122899. The reversal of 783217122872 is 278221712387.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×783217122872² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 783217122872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48951070172 + ... + 48951070187.

It is an arithmetic number, because the mean of its divisors is an integer number (183566513175).

Almost surely, 2^783217122872 is an apocalyptic number.

It is an amenable number.

783217122872 is a deficient number, since it is larger than the sum of its proper divisors (685314982528).

783217122872 is a wasteful number, since it uses less digits than its factorization.

783217122872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97902140365 (or 97902140361 counting only the distinct ones).

The product of its digits is 1053696, while the sum is 50.

The spelling of 783217122872 in words is "seven hundred eighty-three billion, two hundred seventeen million, one hundred twenty-two thousand, eight hundred seventy-two".