823425585437 has 16 divisors (see below), whose sum is σ = 1028572954752. Its totient is φ = 641777653440.

The previous prime is 823425585427. The next prime is 823425585467. The reversal of 823425585437 is 734585524328.

It is a happy number.

It is not a de Polignac number, because 823425585437 - 2⁶ = 823425585373 is a prime.

It is a super-4 number, since 4×823425585437⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823425585427) 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, 67521014 + ... + 67533207.

It is an arithmetic number, because the mean of its divisors is an integer number (64285809672).

Almost surely, 2^823425585437 is an apocalyptic number.

It is an amenable number.

823425585437 is a deficient number, since it is larger than the sum of its proper divisors (205147369315).

823425585437 is a wasteful number, since it uses less digits than its factorization.

823425585437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135054308.

The product of its digits is 32256000, while the sum is 56.

The spelling of 823425585437 in words is "eight hundred twenty-three billion, four hundred twenty-five million, five hundred eighty-five thousand, four hundred thirty-seven".