641212635 has 16 divisors (see below), whose sum is σ = 1172503296. Its totient is φ = 293125728.

The previous prime is 641212633. The next prime is 641212657. The reversal of 641212635 is 536212146.

It is not a de Polignac number, because 641212635 - 2¹ = 641212633 is a prime.

It is a super-2 number, since 2×641212635² = 822307286567286450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641212631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3053289 + ... + 3053498.

It is an arithmetic number, because the mean of its divisors is an integer number (73281456).

Almost surely, 2^641212635 is an apocalyptic number.

641212635 is a deficient number, since it is larger than the sum of its proper divisors (531290661).

641212635 is a wasteful number, since it uses less digits than its factorization.

641212635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6106802.

The product of its digits is 8640, while the sum is 30.

The square root of 641212635 is about 25322.1767429263. The cubic root of 641212635 is about 862.3178123905.

The spelling of 641212635 in words is "six hundred forty-one million, two hundred twelve thousand, six hundred thirty-five".