641601377 has 2 divisors, whose sum is σ = 641601378. Its totient is φ = 641601376.

The previous prime is 641601361. The next prime is 641601407. The reversal of 641601377 is 773106146.

641601377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 628956241 + 12645136 = 25079^2 + 3556^2 .

It is a cyclic number.

It is not a de Polignac number, because 641601377 - 2⁴ = 641601361 is a prime.

It is a super-2 number, since 2×641601377² = 823304653936592258, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (641601347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320800688 + 320800689.

It is an arithmetic number, because the mean of its divisors is an integer number (320800689).

Almost surely, 2^641601377 is an apocalyptic number.

It is an amenable number.

641601377 is a deficient number, since it is larger than the sum of its proper divisors (1).

641601377 is an equidigital number, since it uses as much as digits as its factorization.

641601377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 641601377 is about 25329.8514997621. The cubic root of 641601377 is about 862.4920403102.

The spelling of 641601377 in words is "six hundred forty-one million, six hundred one thousand, three hundred seventy-seven".