2640405237121 has 2 divisors, whose sum is σ = 2640405237122. Its totient is φ = 2640405237120.

The previous prime is 2640405237047. The next prime is 2640405237131. The reversal of 2640405237121 is 1217325040462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2394524130625 + 245881106496 = 1547425^2 + 495864^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640405237121 - 2³⁵ = 2606045498753 is a prime.

It is not a weakly prime, because it can be changed into another prime (2640405237131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320202618560 + 1320202618561.

It is an arithmetic number, because the mean of its divisors is an integer number (1320202618561).

Almost surely, 2^{2640405237121} is an apocalyptic number.

It is an amenable number.

2640405237121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640405237121 is an equidigital number, since it uses as much as digits as its factorization.

2640405237121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 2640405237121 in words is "two trillion, six hundred forty billion, four hundred five million, two hundred thirty-seven thousand, one hundred twenty-one".