200644878431 has 2 divisors, whose sum is σ = 200644878432. Its totient is φ = 200644878430.

The previous prime is 200644878407. The next prime is 200644878433. The reversal of 200644878431 is 134878446002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 200644878431 - 2⁶ = 200644878367 is a prime.

It is a super-3 number, since 3×200644878431³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 200644878433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200644878433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100322439215 + 100322439216.

It is an arithmetic number, because the mean of its divisors is an integer number (100322439216).

Almost surely, 2^200644878431 is an apocalyptic number.

200644878431 is a deficient number, since it is larger than the sum of its proper divisors (1).

200644878431 is an equidigital number, since it uses as much as digits as its factorization.

200644878431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1032192, while the sum is 47.

The spelling of 200644878431 in words is "two hundred billion, six hundred forty-four million, eight hundred seventy-eight thousand, four hundred thirty-one".