641656254 has 16 divisors (see below), whose sum is σ = 1339108992. Its totient is φ = 204586008.

The previous prime is 641656247. The next prime is 641656283. The reversal of 641656254 is 452656146.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2324704 + ... + 2324979.

It is an arithmetic number, because the mean of its divisors is an integer number (83694312).

Almost surely, 2^641656254 is an apocalyptic number.

641656254 is an abundant number, since it is smaller than the sum of its proper divisors (697452738).

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

641656254 is a wasteful number, since it uses less digits than its factorization.

641656254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4649711.

The product of its digits is 172800, while the sum is 39.

The square root of 641656254 is about 25330.9347241668. The cubic root of 641656254 is about 862.5166296311.

The spelling of 641656254 in words is "six hundred forty-one million, six hundred fifty-six thousand, two hundred fifty-four".