641311436 has 12 divisors (see below), whose sum is σ = 1127993328. Its totient is φ = 319027632.

The previous prime is 641311403. The next prime is 641311441. The reversal of 641311436 is 634113146.

It is a super-2 number, since 2×641311436² = 822560715888764192, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641311399 and 641311408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406136 + ... + 407711.

It is an arithmetic number, because the mean of its divisors is an integer number (93999444).

Almost surely, 2^641311436 is an apocalyptic number.

It is an amenable number.

641311436 is a deficient number, since it is larger than the sum of its proper divisors (486681892).

641311436 is a wasteful number, since it uses less digits than its factorization.

641311436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814048 (or 814046 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 641311436 is about 25324.1275466698. The cubic root of 641311436 is about 862.3621000844.

The spelling of 641311436 in words is "six hundred forty-one million, three hundred eleven thousand, four hundred thirty-six".