100644523271 has 4 divisors (see below), whose sum is σ = 100678911072. Its totient is φ = 100610135472.

The previous prime is 100644523223. The next prime is 100644523277. The reversal of 100644523271 is 172325446001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100644523271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100644523277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17189510 + ... + 17195363.

It is an arithmetic number, because the mean of its divisors is an integer number (25169727768).

Almost surely, 2^100644523271 is an apocalyptic number.

100644523271 is a deficient number, since it is larger than the sum of its proper divisors (34387801).

100644523271 is an equidigital number, since it uses as much as digits as its factorization.

100644523271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34387800.

The product of its (nonzero) digits is 40320, while the sum is 35.

Adding to 100644523271 its reverse (172325446001), we get a palindrome (272969969272).

The spelling of 100644523271 in words is "one hundred billion, six hundred forty-four million, five hundred twenty-three thousand, two hundred seventy-one".