2640911007769 has 2 divisors, whose sum is σ = 2640911007770. Its totient is φ = 2640911007768.

The previous prime is 2640911007733. The next prime is 2640911007821. The reversal of 2640911007769 is 9677001190462.

2640911007769 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (2640911007821) can be obtained adding 2640911007769 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2640911007744 + 25 = 1625088^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640911007769 - 2³¹ = 2638763524121 is a prime.

It is a super-2 number, since 2×2640911007769² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2640911007269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320455503884 + 1320455503885.

It is an arithmetic number, because the mean of its divisors is an integer number (1320455503885).

Almost surely, 2^{2640911007769} is an apocalyptic number.

It is an amenable number.

2640911007769 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640911007769 is an equidigital number, since it uses as much as digits as its factorization.

2640911007769 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 52.

The spelling of 2640911007769 in words is "two trillion, six hundred forty billion, nine hundred eleven million, seven thousand, seven hundred sixty-nine".