641167761149 has 2 divisors, whose sum is σ = 641167761150. Its totient is φ = 641167761148.

The previous prime is 641167761139. The next prime is 641167761191. The reversal of 641167761149 is 941167761146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 524762604025 + 116405157124 = 724405^2 + 341182^2 .

It is a cyclic number.

It is not a de Polignac number, because 641167761149 - 2³⁶ = 572448284413 is a prime.

It is a super-2 number, since 2×641167761149² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641167761149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641167761119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320583880574 + 320583880575.

It is an arithmetic number, because the mean of its divisors is an integer number (320583880575).

Almost surely, 2^641167761149 is an apocalyptic number.

It is an amenable number.

641167761149 is a deficient number, since it is larger than the sum of its proper divisors (1).

641167761149 is an equidigital number, since it uses as much as digits as its factorization.

641167761149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 53.

The spelling of 641167761149 in words is "six hundred forty-one billion, one hundred sixty-seven million, seven hundred sixty-one thousand, one hundred forty-nine".