2780325761 has 2 divisors, whose sum is σ = 2780325762. Its totient is φ = 2780325760.

The previous prime is 2780325739. The next prime is 2780325773. The reversal of 2780325761 is 1675230872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2747332225 + 32993536 = 52415^2 + 5744^2 .

It is a cyclic number.

It is not a de Polignac number, because 2780325761 - 2⁶ = 2780325697 is a prime.

It is a super-2 number, since 2×2780325761² = 15460422674560458242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2780355761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390162880 + 1390162881.

It is an arithmetic number, because the mean of its divisors is an integer number (1390162881).

Almost surely, 2^2780325761 is an apocalyptic number.

It is an amenable number.

2780325761 is a deficient number, since it is larger than the sum of its proper divisors (1).

2780325761 is an equidigital number, since it uses as much as digits as its factorization.

2780325761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 2780325761 is about 52728.7944201268. The cubic root of 2780325761 is about 1406.1507879413.

The spelling of 2780325761 in words is "two billion, seven hundred eighty million, three hundred twenty-five thousand, seven hundred sixty-one".