671150840639 has 2 divisors, whose sum is σ = 671150840640. Its totient is φ = 671150840638.

The previous prime is 671150840561. The next prime is 671150840651. The reversal of 671150840639 is 936048051176.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671150840639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671150840669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335575420319 + 335575420320.

It is an arithmetic number, because the mean of its divisors is an integer number (335575420320).

Almost surely, 2^671150840639 is an apocalyptic number.

671150840639 is a deficient number, since it is larger than the sum of its proper divisors (1).

671150840639 is an equidigital number, since it uses as much as digits as its factorization.

671150840639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 671150840639 in words is "six hundred seventy-one billion, one hundred fifty million, eight hundred forty thousand, six hundred thirty-nine".