641479446 has 16 divisors (see below), whose sum is σ = 1425510000. Its totient is φ = 213826464.

The previous prime is 641479441. The next prime is 641479459. The reversal of 641479446 is 644974146.

641479446 is a `hidden beast` number, since 64 + 147 + 9 + 446 = 666.

It is a super-2 number, since 2×641479446² = 822991759280933832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641479441) 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, 5939571 + ... + 5939678.

It is an arithmetic number, because the mean of its divisors is an integer number (89094375).

Almost surely, 2^641479446 is an apocalyptic number.

641479446 is an abundant number, since it is smaller than the sum of its proper divisors (784030554).

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

641479446 is a wasteful number, since it uses less digits than its factorization.

641479446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11879260 (or 11879254 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 641479446 is about 25327.4445217041. Note that the first 3 decimals coincide. The cubic root of 641479446 is about 862.4374003716.

The spelling of 641479446 in words is "six hundred forty-one million, four hundred seventy-nine thousand, four hundred forty-six".