2640405237047 has 2 divisors, whose sum is σ = 2640405237048. Its totient is φ = 2640405237046.

The previous prime is 2640405237007. The next prime is 2640405237121. The reversal of 2640405237047 is 7407325040462.

2640405237047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2640405237047 - 2²² = 2640401042743 is a prime.

It is a super-2 number, since 2×2640405237047² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2640405236989 and 2640405237007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2640405237007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320202618523 + 1320202618524.

It is an arithmetic number, because the mean of its divisors is an integer number (1320202618524).

Almost surely, 2^{2640405237047} is an apocalyptic number.

2640405237047 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640405237047 is an equidigital number, since it uses as much as digits as its factorization.

2640405237047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 44.

The spelling of 2640405237047 in words is "two trillion, six hundred forty billion, four hundred five million, two hundred thirty-seven thousand, forty-seven".