423821253526 has 16 divisors (see below), whose sum is σ = 702304496640. Its totient is φ = 190207466280.

The previous prime is 423821253511. The next prime is 423821253551. The reversal of 423821253526 is 625352128324.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121926126 + ... + 121929601.

It is an arithmetic number, because the mean of its divisors is an integer number (43894031040).

Almost surely, 2^423821253526 is an apocalyptic number.

423821253526 is a deficient number, since it is larger than the sum of its proper divisors (278483243114).

423821253526 is a wasteful number, since it uses less digits than its factorization.

423821253526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243855819.

The product of its digits is 691200, while the sum is 43.

The spelling of 423821253526 in words is "four hundred twenty-three billion, eight hundred twenty-one million, two hundred fifty-three thousand, five hundred twenty-six".