2540400529477 has 2 divisors, whose sum is σ = 2540400529478. Its totient is φ = 2540400529476.

The previous prime is 2540400529417. The next prime is 2540400529481. The reversal of 2540400529477 is 7749250040452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1997999212036 + 542401317441 = 1413506^2 + 736479^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2540400529477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2540400529477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2540400529417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270200264738 + 1270200264739.

It is an arithmetic number, because the mean of its divisors is an integer number (1270200264739).

Almost surely, 2^{2540400529477} is an apocalyptic number.

It is an amenable number.

2540400529477 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540400529477 is an equidigital number, since it uses as much as digits as its factorization.

2540400529477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2822400, while the sum is 49.

The spelling of 2540400529477 in words is "two trillion, five hundred forty billion, four hundred million, five hundred twenty-nine thousand, four hundred seventy-seven".