781452072212 has 48 divisors (see below), whose sum is σ = 1606316799360. Its totient is φ = 325618538112.

The previous prime is 781452072179. The next prime is 781452072239. The reversal of 781452072212 is 212270254187.

It is a super-2 number, since 2×781452072212² (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 781452072212.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1147739 + ... + 1697117.

It is an arithmetic number, because the mean of its divisors is an integer number (33464933320).

Almost surely, 2^781452072212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 781452072212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (803158399680).

781452072212 is an abundant number, since it is smaller than the sum of its proper divisors (824864727148).

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

781452072212 is a wasteful number, since it uses less digits than its factorization.

781452072212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550800 (or 550798 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 41.

The spelling of 781452072212 in words is "seven hundred eighty-one billion, four hundred fifty-two million, seventy-two thousand, two hundred twelve".