2261640377 has 2 divisors, whose sum is σ = 2261640378. Its totient is φ = 2261640376.

The previous prime is 2261640343. The next prime is 2261640391. The reversal of 2261640377 is 7730461622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1956823696 + 304816681 = 44236^2 + 17459^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261640377 - 2¹² = 2261636281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2261640377.

It is not a weakly prime, because it can be changed into another prime (2261640317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130820188 + 1130820189.

It is an arithmetic number, because the mean of its divisors is an integer number (1130820189).

Almost surely, 2^2261640377 is an apocalyptic number.

It is an amenable number.

2261640377 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261640377 is an equidigital number, since it uses as much as digits as its factorization.

2261640377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 2261640377 is about 47556.7069612689. The cubic root of 2261640377 is about 1312.6265460087.

The spelling of 2261640377 in words is "two billion, two hundred sixty-one million, six hundred forty thousand, three hundred seventy-seven".