641574798 has 24 divisors (see below), whose sum is σ = 1363072632. Its totient is φ = 201277824.

The previous prime is 641574797. The next prime is 641574799. The reversal of 641574798 is 897475146.

It is an interprime number because it is at equal distance from previous prime (641574797) and next prime (641574799).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 641574798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641574797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183265 + ... + 186732.

It is an arithmetic number, because the mean of its divisors is an integer number (56794693).

Almost surely, 2^641574798 is an apocalyptic number.

641574798 is an abundant number, since it is smaller than the sum of its proper divisors (721497834).

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

641574798 is a wasteful number, since it uses less digits than its factorization.

641574798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370036 (or 370019 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 51.

The square root of 641574798 is about 25329.3268366927. The cubic root of 641574798 is about 862.4801302711.

The spelling of 641574798 in words is "six hundred forty-one million, five hundred seventy-four thousand, seven hundred ninety-eight".