782056235421 has 12 divisors (see below), whose sum is σ = 1129829730172. Its totient is φ = 521281771776.

The previous prime is 782056235419. The next prime is 782056235447. The reversal of 782056235421 is 124532650287.

782056235421 is a `hidden beast` number, since 7 + 82 + 0 + 5 + 6 + 23 + 542 + 1 = 666.

782056235421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 763229376900 + 18826858521 = 873630^2 + 137211^2 .

It is not a de Polignac number, because 782056235421 - 2¹ = 782056235419 is a prime.

It is a super-2 number, since 2×782056235421² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (782056235461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7365346 + ... + 7470771.

Almost surely, 2^782056235421 is an apocalyptic number.

It is an amenable number.

782056235421 is a deficient number, since it is larger than the sum of its proper divisors (347773494751).

782056235421 is a wasteful number, since it uses less digits than its factorization.

782056235421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14841980 (or 14841977 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 782056235421 in words is "seven hundred eighty-two billion, fifty-six million, two hundred thirty-five thousand, four hundred twenty-one".