2505400352549 has 2 divisors, whose sum is σ = 2505400352550. Its totient is φ = 2505400352548.

The previous prime is 2505400352473. The next prime is 2505400352557. The reversal of 2505400352549 is 9452530045052.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2468763712900 + 36636639649 = 1571230^2 + 191407^2 .

It is a cyclic number.

It is not a de Polignac number, because 2505400352549 - 2¹² = 2505400348453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2505400352149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252700176274 + 1252700176275.

It is an arithmetic number, because the mean of its divisors is an integer number (1252700176275).

Almost surely, 2^{2505400352549} is an apocalyptic number.

It is an amenable number.

2505400352549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2505400352549 is an equidigital number, since it uses as much as digits as its factorization.

2505400352549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080000, while the sum is 44.

The spelling of 2505400352549 in words is "two trillion, five hundred five billion, four hundred million, three hundred fifty-two thousand, five hundred forty-nine".