423203501556 has 72 divisors (see below), whose sum is σ = 1167261103008. Its totient is φ = 128216520000.

The previous prime is 423203501533. The next prime is 423203501561. The reversal of 423203501556 is 655105302324.

423203501556 is a `hidden beast` number, since 42 + 32 + 0 + 35 + 0 + 1 + 556 = 666.

423203501556 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×423203501556² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 423203501556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1815031 + ... + 2034881.

It is an arithmetic number, because the mean of its divisors is an integer number (16211959764).

Almost surely, 2^423203501556 is an apocalyptic number.

It is an amenable number.

423203501556 is an abundant number, since it is smaller than the sum of its proper divisors (744057601452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423203501556 is a wasteful number, since it uses less digits than its factorization.

423203501556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224733 (or 224728 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 423203501556 in words is "four hundred twenty-three billion, two hundred three million, five hundred one thousand, five hundred fifty-six".