801644631 has 4 divisors (see below), whose sum is σ = 1068859512. Its totient is φ = 534429752.

The previous prime is 801644621. The next prime is 801644653. The reversal of 801644631 is 136446108.

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

It is a cyclic number.

It is not a de Polignac number, because 801644631 - 2⁶ = 801644567 is a prime.

It is a super-2 number, since 2×801644631² = 1285268228822252322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 801644592 and 801644601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801644621) 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, 133607436 + ... + 133607441.

It is an arithmetic number, because the mean of its divisors is an integer number (267214878).

Almost surely, 2^801644631 is an apocalyptic number.

801644631 is a deficient number, since it is larger than the sum of its proper divisors (267214881).

801644631 is a wasteful number, since it uses less digits than its factorization.

801644631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267214880.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 801644631 is about 28313.3295640057. The cubic root of 801644631 is about 928.9534730358.

The spelling of 801644631 in words is "eight hundred one million, six hundred forty-four thousand, six hundred thirty-one".