646444254 has 8 divisors (see below), whose sum is σ = 1292888520. Its totient is φ = 215481416.

The previous prime is 646444247. The next prime is 646444301. The reversal of 646444254 is 452444646.

It is a sphenic number, since it is the product of 3 distinct primes.

646444254 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53870349 + ... + 53870360.

It is an arithmetic number, because the mean of its divisors is an integer number (161611065).

Almost surely, 2^646444254 is an apocalyptic number.

646444254 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

646444254 is a wasteful number, since it uses less digits than its factorization.

646444254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107740714.

The product of its digits is 368640, while the sum is 39.

The square root of 646444254 is about 25425.2680221861. The cubic root of 646444254 is about 864.6566643918.

The spelling of 646444254 in words is "six hundred forty-six million, four hundred forty-four thousand, two hundred fifty-four".