641318438786 has 32 divisors (see below), whose sum is σ = 1031727345408. Its totient is φ = 298197789120.

The previous prime is 641318438777. The next prime is 641318438797. The reversal of 641318438786 is 687834813146.

It is a happy number.

It is a super-2 number, since 2×641318438786² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2073116 + ... + 2362296.

It is an arithmetic number, because the mean of its divisors is an integer number (32241479544).

Almost surely, 2^641318438786 is an apocalyptic number.

641318438786 is a deficient number, since it is larger than the sum of its proper divisors (390408906622).

641318438786 is a wasteful number, since it uses less digits than its factorization.

641318438786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290546.

The product of its digits is 18579456, while the sum is 59.

The spelling of 641318438786 in words is "six hundred forty-one billion, three hundred eighteen million, four hundred thirty-eight thousand, seven hundred eighty-six".