200105031644 has 72 divisors (see below), whose sum is σ = 412501617360. Its totient is φ = 84681859584.

The previous prime is 200105031631. The next prime is 200105031661. The reversal of 200105031644 is 446130501002.

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, 5941019 + ... + 5974605.

It is an arithmetic number, because the mean of its divisors is an integer number (5729189130).

Almost surely, 2^200105031644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200105031644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206250808680).

200105031644 is an abundant number, since it is smaller than the sum of its proper divisors (212396585716).

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

200105031644 is a wasteful number, since it uses less digits than its factorization.

200105031644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33987 (or 33978 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 200105031644 its reverse (446130501002), we get a palindrome (646235532646).

The spelling of 200105031644 in words is "two hundred billion, one hundred five million, thirty-one thousand, six hundred forty-four".