641161345 has 16 divisors (see below), whose sum is σ = 862026048. Its totient is φ = 453695040.

The previous prime is 641161343. The next prime is 641161379. The reversal of 641161345 is 543161146.

It is not a de Polignac number, because 641161345 - 2¹ = 641161343 is a prime.

It is a super-2 number, since 2×641161345² = 822175740644418050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641161343) 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, 155499 + ... + 159568.

It is an arithmetic number, because the mean of its divisors is an integer number (53876628).

Almost surely, 2^641161345 is an apocalyptic number.

It is an amenable number.

641161345 is a deficient number, since it is larger than the sum of its proper divisors (220864703).

641161345 is a wasteful number, since it uses less digits than its factorization.

641161345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315120.

The product of its digits is 8640, while the sum is 31.

The square root of 641161345 is about 25321.1639740356. The cubic root of 641161345 is about 862.2948197786.

The spelling of 641161345 in words is "six hundred forty-one million, one hundred sixty-one thousand, three hundred forty-five".