641795537 has 2 divisors, whose sum is σ = 641795538. Its totient is φ = 641795536.

The previous prime is 641795521. The next prime is 641795587. The reversal of 641795537 is 735597146.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 639533521 + 2262016 = 25289^2 + 1504^2 .

It is a cyclic number.

It is not a de Polignac number, because 641795537 - 2⁴ = 641795521 is a prime.

It is a super-2 number, since 2×641795537² = 823803022626236738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641795491 and 641795500.

It is not a weakly prime, because it can be changed into another prime (641795587) by changing a digit.

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 as a sum of consecutive naturals, namely, 320897768 + 320897769.

It is an arithmetic number, because the mean of its divisors is an integer number (320897769).

Almost surely, 2^641795537 is an apocalyptic number.

It is an amenable number.

641795537 is a deficient number, since it is larger than the sum of its proper divisors (1).

641795537 is an equidigital number, since it uses as much as digits as its factorization.

641795537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 793800, while the sum is 47.

The square root of 641795537 is about 25333.6838418735. The cubic root of 641795537 is about 862.5790333514.

The spelling of 641795537 in words is "six hundred forty-one million, seven hundred ninety-five thousand, five hundred thirty-seven".