3835640242061 has 2 divisors, whose sum is σ = 3835640242062. Its totient is φ = 3835640242060.

The previous prime is 3835640242051. The next prime is 3835640242073. The reversal of 3835640242061 is 1602420465383.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2678737789225 + 1156902452836 = 1636685^2 + 1075594^2 .

It is a cyclic number.

It is not a de Polignac number, because 3835640242061 - 2³⁴ = 3818460372877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3835640242051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1917820121030 + 1917820121031.

It is an arithmetic number, because the mean of its divisors is an integer number (1917820121031).

Almost surely, 2^{3835640242061} is an apocalyptic number.

It is an amenable number.

3835640242061 is a deficient number, since it is larger than the sum of its proper divisors (1).

3835640242061 is an equidigital number, since it uses as much as digits as its factorization.

3835640242061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 3835640242061 in words is "three trillion, eight hundred thirty-five billion, six hundred forty million, two hundred forty-two thousand, sixty-one".