2780550055553 has 4 divisors (see below), whose sum is σ = 2781156769728. Its totient is φ = 2779943341380.

The previous prime is 2780550055501. The next prime is 2780550055561. The reversal of 2780550055553 is 3555500550872.

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 2780550055553 - 2⁶ = 2780550055489 is a prime.

It is a super-2 number, since 2×2780550055553² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2780550085553) 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, 303350213 + ... + 303359378.

It is an arithmetic number, because the mean of its divisors is an integer number (695289192432).

Almost surely, 2^{2780550055553} is an apocalyptic number.

It is an amenable number.

2780550055553 is a deficient number, since it is larger than the sum of its proper divisors (606714175).

2780550055553 is an equidigital number, since it uses as much as digits as its factorization.

2780550055553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606714174.

The product of its (nonzero) digits is 5250000, while the sum is 50.

The spelling of 2780550055553 in words is "two trillion, seven hundred eighty billion, five hundred fifty million, fifty-five thousand, five hundred fifty-three".