2780505530555 has 16 divisors (see below), whose sum is σ = 3513205349280. Its totient is φ = 2106737805312.

The previous prime is 2780505530503. The next prime is 2780505530567. The reversal of 2780505530555 is 5550355050872.

It is a cyclic number.

It is not a de Polignac number, because 2780505530555 - 2²² = 2780501336251 is a prime.

It is a super-2 number, since 2×2780505530555² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3776294 + ... + 4452123.

It is an arithmetic number, because the mean of its divisors is an integer number (219575334330).

Almost surely, 2^{2780505530555} is an apocalyptic number.

2780505530555 is a deficient number, since it is larger than the sum of its proper divisors (732699818725).

2780505530555 is a wasteful number, since it uses less digits than its factorization.

2780505530555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8231998.

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

The spelling of 2780505530555 in words is "two trillion, seven hundred eighty billion, five hundred five million, five hundred thirty thousand, five hundred fifty-five".