2780005550057 has 4 divisors (see below), whose sum is σ = 2818087817940. Its totient is φ = 2741923282176.

The previous prime is 2780005550053. The next prime is 2780005550081. The reversal of 2780005550057 is 7500555000872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1049454776041 + 1730550774016 = 1024429^2 + 1315504^2 .

It is a cyclic number.

It is not a de Polignac number, because 2780005550057 - 2² = 2780005550053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2780005550053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19041133832 + ... + 19041133977.

It is an arithmetic number, because the mean of its divisors is an integer number (704521954485).

Almost surely, 2^{2780005550057} is an apocalyptic number.

It is an amenable number.

2780005550057 is a deficient number, since it is larger than the sum of its proper divisors (38082267883).

2780005550057 is an equidigital number, since it uses as much as digits as its factorization.

2780005550057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38082267882.

The product of its (nonzero) digits is 490000, while the sum is 44.

The spelling of 2780005550057 in words is "two trillion, seven hundred eighty billion, five million, five hundred fifty thousand, fifty-seven".