772705638423 has 40 divisors (see below), whose sum is σ = 1162244920320. Its totient is φ = 511598514240.

The previous prime is 772705638389. The next prime is 772705638427. The reversal of 772705638423 is 324836507277.

772705638423 is a `hidden beast` number, since 7 + 7 + 2 + 70 + 563 + 8 + 4 + 2 + 3 = 666.

772705638423 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 772705638423 - 2⁹ = 772705637911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 772705638423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772705638427) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6851178 + ... + 6963048.

It is an arithmetic number, because the mean of its divisors is an integer number (29056123008).

Almost surely, 2^772705638423 is an apocalyptic number.

772705638423 is a deficient number, since it is larger than the sum of its proper divisors (389539281897).

772705638423 is a wasteful number, since it uses less digits than its factorization.

772705638423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112469 (or 112460 counting only the distinct ones).

The product of its (nonzero) digits is 11854080, while the sum is 54.

The spelling of 772705638423 in words is "seven hundred seventy-two billion, seven hundred five million, six hundred thirty-eight thousand, four hundred twenty-three".