61633540061311 has 2 divisors, whose sum is σ = 61633540061312. Its totient is φ = 61633540061310.

The previous prime is 61633540061297. The next prime is 61633540061321. The reversal of 61633540061311 is 11316004533616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61633540061311 - 2²⁵ = 61633506506879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61633540061321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30816770030655 + 30816770030656.

It is an arithmetic number, because the mean of its divisors is an integer number (30816770030656).

Almost surely, 2^{61633540061311} is an apocalyptic number.

61633540061311 is a deficient number, since it is larger than the sum of its proper divisors (1).

61633540061311 is an equidigital number, since it uses as much as digits as its factorization.

61633540061311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 40.

Adding to 61633540061311 its reverse (11316004533616), we get a palindrome (72949544594927).

The spelling of 61633540061311 in words is "sixty-one trillion, six hundred thirty-three billion, five hundred forty million, sixty-one thousand, three hundred eleven".