203123278864 has 45 divisors (see below), whose sum is σ = 432623475039. Its totient is φ = 92319749280.

The previous prime is 203123278847. The next prime is 203123278871. The reversal of 203123278864 is 468872321302.

The square root of 203123278864 is 450692.

It is a perfect power (a square), and thus also a powerful number.

It is a super-3 number, since 3×203123278864³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 19825327 + ... + 19835569.

Almost surely, 2^203123278864 is an apocalyptic number.

203123278864 is the 450692-nd square number.

It is an amenable number.

203123278864 is an abundant number, since it is smaller than the sum of its proper divisors (229500196175).

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

203123278864 is an frugal number, since it uses more digits than its factorization.

203123278864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20516 (or 10256 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 46.

The spelling of 203123278864 in words is "two hundred three billion, one hundred twenty-three million, two hundred seventy-eight thousand, eight hundred sixty-four".