2361378781 has 2 divisors, whose sum is σ = 2361378782. Its totient is φ = 2361378780.

The previous prime is 2361378731. The next prime is 2361378791. The reversal of 2361378781 is 1878731632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2348953156 + 12425625 = 48466^2 + 3525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2361378781 is a prime.

It is a super-2 number, since 2×2361378781² = 11152219494714091922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2361378731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1180689390 + 1180689391.

It is an arithmetic number, because the mean of its divisors is an integer number (1180689391).

Almost surely, 2^2361378781 is an apocalyptic number.

It is an amenable number.

2361378781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2361378781 is an equidigital number, since it uses as much as digits as its factorization.

2361378781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 46.

The square root of 2361378781 is about 48594.0200127547. The cubic root of 2361378781 is about 1331.6452740702.

The spelling of 2361378781 in words is "two billion, three hundred sixty-one million, three hundred seventy-eight thousand, seven hundred eighty-one".