2566795026949 has 4 divisors (see below), whose sum is σ = 2649594866560. Its totient is φ = 2483995187340.

The previous prime is 2566795026911. The next prime is 2566795026953. The reversal of 2566795026949 is 9496205976652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2566795026949 - 2⁹ = 2566795026437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566795026959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41399919759 + ... + 41399919820.

It is an arithmetic number, because the mean of its divisors is an integer number (662398716640).

Almost surely, 2^{2566795026949} is an apocalyptic number.

It is an amenable number.

2566795026949 is a deficient number, since it is larger than the sum of its proper divisors (82799839611).

2566795026949 is an equidigital number, since it uses as much as digits as its factorization.

2566795026949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82799839610.

The product of its (nonzero) digits is 440899200, while the sum is 70.

The spelling of 2566795026949 in words is "two trillion, five hundred sixty-six billion, seven hundred ninety-five million, twenty-six thousand, nine hundred forty-nine".