2761278061 has 2 divisors, whose sum is σ = 2761278062. Its totient is φ = 2761278060.

The previous prime is 2761278053. The next prime is 2761278083. The reversal of 2761278061 is 1608721672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2447775625 + 313502436 = 49475^2 + 17706^2 .

It is a cyclic number.

It is not a de Polignac number, because 2761278061 - 2³ = 2761278053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2761279061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1380639030 + 1380639031.

It is an arithmetic number, because the mean of its divisors is an integer number (1380639031).

Almost surely, 2^2761278061 is an apocalyptic number.

It is an amenable number.

2761278061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2761278061 is an equidigital number, since it uses as much as digits as its factorization.

2761278061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 2761278061 is about 52547.8644761136. The cubic root of 2761278061 is about 1402.9322997590.

The spelling of 2761278061 in words is "two billion, seven hundred sixty-one million, two hundred seventy-eight thousand, sixty-one".