641246826 has 16 divisors (see below), whose sum is σ = 1399084128. Its totient is φ = 194317200.

The previous prime is 641246821. The next prime is 641246833. The reversal of 641246826 is 628642146.

It is a super-2 number, since 2×641246826² = 822394983710148552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641246821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4857865 + ... + 4857996.

It is an arithmetic number, because the mean of its divisors is an integer number (87442758).

Almost surely, 2^641246826 is an apocalyptic number.

641246826 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

641246826 is an abundant number, since it is smaller than the sum of its proper divisors (757837302).

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

641246826 is a wasteful number, since it uses less digits than its factorization.

641246826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9715877.

The product of its digits is 110592, while the sum is 39.

The square root of 641246826 is about 25322.8518536124. The cubic root of 641246826 is about 862.3331390714. Note that the first 3 decimals are identical.

The spelling of 641246826 in words is "six hundred forty-one million, two hundred forty-six thousand, eight hundred twenty-six".