2605771720550 has 12 divisors (see below), whose sum is σ = 4846735400316. Its totient is φ = 1042308688200.

The previous prime is 2605771720543. The next prime is 2605771720553. The reversal of 2605771720550 is 550271775062.

It is a junction number, because it is equal to n+sod(n) for n = 2605771720495 and 2605771720504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605771720553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26057717156 + ... + 26057717255.

It is an arithmetic number, because the mean of its divisors is an integer number (403894616693).

Almost surely, 2^{2605771720550} is an apocalyptic number.

2605771720550 is a deficient number, since it is larger than the sum of its proper divisors (2240963679766).

2605771720550 is a wasteful number, since it uses less digits than its factorization.

2605771720550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52115434423 (or 52115434418 counting only the distinct ones).

The product of its (nonzero) digits is 1029000, while the sum is 47.

The spelling of 2605771720550 in words is "two trillion, six hundred five billion, seven hundred seventy-one million, seven hundred twenty thousand, five hundred fifty".