641274385 has 8 divisors (see below), whose sum is σ = 802987200. Its totient is φ = 490714224.

The previous prime is 641274373. The next prime is 641274409. The reversal of 641274385 is 583472146.

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

It is a cyclic number.

It is not a de Polignac number, because 641274385 - 2¹⁵ = 641241617 is a prime.

It is a super-2 number, since 2×641274385² = 822465673714256450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2788035 + ... + 2788264.

It is an arithmetic number, because the mean of its divisors is an integer number (100373400).

Almost surely, 2^641274385 is an apocalyptic number.

It is an amenable number.

641274385 is a deficient number, since it is larger than the sum of its proper divisors (161712815).

641274385 is a wasteful number, since it uses less digits than its factorization.

641274385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5576327.

The product of its digits is 161280, while the sum is 40.

The square root of 641274385 is about 25323.3960005367. The cubic root of 641274385 is about 862.3454924521.

The spelling of 641274385 in words is "six hundred forty-one million, two hundred seventy-four thousand, three hundred eighty-five".