2640671703391 has 2 divisors, whose sum is σ = 2640671703392. Its totient is φ = 2640671703390.

The previous prime is 2640671703367. The next prime is 2640671703589. The reversal of 2640671703391 is 1933071760462.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2640671703391 - 2¹³ = 2640671695199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2640671703331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320335851695 + 1320335851696.

It is an arithmetic number, because the mean of its divisors is an integer number (1320335851696).

Almost surely, 2^{2640671703391} is an apocalyptic number.

2640671703391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640671703391 is an equidigital number, since it uses as much as digits as its factorization.

2640671703391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 49.

The spelling of 2640671703391 in words is "two trillion, six hundred forty billion, six hundred seventy-one million, seven hundred three thousand, three hundred ninety-one".