645702380311 has 2 divisors, whose sum is σ = 645702380312. Its totient is φ = 645702380310.

The previous prime is 645702380237. The next prime is 645702380317. The reversal of 645702380311 is 113083207546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645702380311 - 2³³ = 637112445719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645702380317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322851190155 + 322851190156.

It is an arithmetic number, because the mean of its divisors is an integer number (322851190156).

Almost surely, 2^645702380311 is an apocalyptic number.

645702380311 is a deficient number, since it is larger than the sum of its proper divisors (1).

645702380311 is an equidigital number, since it uses as much as digits as its factorization.

645702380311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

Adding to 645702380311 its reverse (113083207546), we get a palindrome (758785587857).

The spelling of 645702380311 in words is "six hundred forty-five billion, seven hundred two million, three hundred eighty thousand, three hundred eleven".