641332020097 has 2 divisors, whose sum is σ = 641332020098. Its totient is φ = 641332020096.

The previous prime is 641332020083. The next prime is 641332020137. The reversal of 641332020097 is 790020233146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 601975808641 + 39356211456 = 775871^2 + 198384^2 .

It is a cyclic number.

It is not a de Polignac number, because 641332020097 - 2¹¹ = 641332018049 is a prime.

It is a super-2 number, since 2×641332020097² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641332023097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320666010048 + 320666010049.

It is an arithmetic number, because the mean of its divisors is an integer number (320666010049).

Almost surely, 2^641332020097 is an apocalyptic number.

It is an amenable number.

641332020097 is a deficient number, since it is larger than the sum of its proper divisors (1).

641332020097 is an equidigital number, since it uses as much as digits as its factorization.

641332020097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 37.

The spelling of 641332020097 in words is "six hundred forty-one billion, three hundred thirty-two million, twenty thousand, ninety-seven".