781843660052 has 48 divisors (see below), whose sum is σ = 1707039113472. Its totient is φ = 305063781120.

The previous prime is 781843660051. The next prime is 781843660067. The reversal of 781843660052 is 250066348187.

It is a super-2 number, since 2×781843660052² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (781843660051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14685224 + ... + 14738367.

It is an arithmetic number, because the mean of its divisors is an integer number (35563314864).

Almost surely, 2^781843660052 is an apocalyptic number.

It is an amenable number.

781843660052 is an abundant number, since it is smaller than the sum of its proper divisors (925195453420).

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

781843660052 is a wasteful number, since it uses less digits than its factorization.

781843660052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29423688 (or 29423686 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 781843660052 in words is "seven hundred eighty-one billion, eight hundred forty-three million, six hundred sixty thousand, fifty-two".