2780697503057 has 2 divisors, whose sum is σ = 2780697503058. Its totient is φ = 2780697503056.

The previous prime is 2780697503039. The next prime is 2780697503063. The reversal of 2780697503057 is 7503057960872.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2551380068416 + 229317434641 = 1597304^2 + 478871^2 .

It is a cyclic number.

It is not a de Polignac number, because 2780697503057 - 2¹⁸ = 2780697240913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2780697502987 and 2780697503005.

It is not a weakly prime, because it can be changed into another prime (2780697503657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390348751528 + 1390348751529.

It is an arithmetic number, because the mean of its divisors is an integer number (1390348751529).

Almost surely, 2^{2780697503057} is an apocalyptic number.

It is an amenable number.

2780697503057 is a deficient number, since it is larger than the sum of its proper divisors (1).

2780697503057 is an equidigital number, since it uses as much as digits as its factorization.

2780697503057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22226400, while the sum is 59.

The spelling of 2780697503057 in words is "two trillion, seven hundred eighty billion, six hundred ninety-seven million, five hundred three thousand, fifty-seven".