641751412 has 12 divisors (see below), whose sum is σ = 1126655236. Its totient is φ = 319849920.

The previous prime is 641751403. The next prime is 641751413. The reversal of 641751412 is 214157146.

It can be written as a sum of positive squares in 2 ways, for example, as 178382736 + 463368676 = 13356^2 + 21526^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641751413) 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, 255039 + ... + 257542.

Almost surely, 2^641751412 is an apocalyptic number.

It is an amenable number.

641751412 is a deficient number, since it is larger than the sum of its proper divisors (484903824).

641751412 is a wasteful number, since it uses less digits than its factorization.

641751412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512898 (or 512896 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 641751412 is about 25332.8129507957. The cubic root of 641751412 is about 862.5592647647.

The spelling of 641751412 in words is "six hundred forty-one million, seven hundred fifty-one thousand, four hundred twelve".