641264402027 has 2 divisors, whose sum is σ = 641264402028. Its totient is φ = 641264402026.

The previous prime is 641264402003. The next prime is 641264402063. The reversal of 641264402027 is 720204462146.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641264402027 is a prime.

It is a super-2 number, since 2×641264402027² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641264432027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320632201013 + 320632201014.

It is an arithmetic number, because the mean of its divisors is an integer number (320632201014).

Almost surely, 2^641264402027 is an apocalyptic number.

641264402027 is a deficient number, since it is larger than the sum of its proper divisors (1).

641264402027 is an equidigital number, since it uses as much as digits as its factorization.

641264402027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 38.

The spelling of 641264402027 in words is "six hundred forty-one billion, two hundred sixty-four million, four hundred two thousand, twenty-seven".