709640559423 has 24 divisors (see below), whose sum is σ = 1114665943248. Its totient is φ = 433230481152.

The previous prime is 709640559379. The next prime is 709640559461. The reversal of 709640559423 is 324955046907.

709640559423 is a `hidden beast` number, since 7 + 0 + 9 + 6 + 40 + 5 + 594 + 2 + 3 = 666.

It is not a de Polignac number, because 709640559423 - 2¹⁰ = 709640558399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 709640559423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709640559623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62672361 + ... + 62683682.

It is an arithmetic number, because the mean of its divisors is an integer number (46444414302).

Almost surely, 2^709640559423 is an apocalyptic number.

709640559423 is a deficient number, since it is larger than the sum of its proper divisors (405025383825).

709640559423 is a wasteful number, since it uses less digits than its factorization.

709640559423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125356103 (or 125356100 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 709640559423 in words is "seven hundred nine billion, six hundred forty million, five hundred fifty-nine thousand, four hundred twenty-three".