2600401361 has 2 divisors, whose sum is σ = 2600401362. Its totient is φ = 2600401360.

The previous prime is 2600401357. The next prime is 2600401399. The reversal of 2600401361 is 1631040062.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2497500625 + 102900736 = 49975^2 + 10144^2 .

It is a cyclic number.

It is not a de Polignac number, because 2600401361 - 2² = 2600401357 is a prime.

It is not a weakly prime, because it can be changed into another prime (2600403361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1300200680 + 1300200681.

It is an arithmetic number, because the mean of its divisors is an integer number (1300200681).

Almost surely, 2^2600401361 is an apocalyptic number.

It is an amenable number.

2600401361 is a deficient number, since it is larger than the sum of its proper divisors (1).

2600401361 is an equidigital number, since it uses as much as digits as its factorization.

2600401361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2600401361 is about 50994.1306524584. The cubic root of 2600401361 is about 1375.1396197176.

The spelling of 2600401361 in words is "two billion, six hundred million, four hundred one thousand, three hundred sixty-one".