61646312093 has 2 divisors, whose sum is σ = 61646312094. Its totient is φ = 61646312092.

The previous prime is 61646312089. The next prime is 61646312111. The reversal of 61646312093 is 39021364616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45659997124 + 15986314969 = 213682^2 + 126437^2 .

It is a cyclic number.

It is not a de Polignac number, because 61646312093 - 2² = 61646312089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61646312093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61646312053) 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, 30823156046 + 30823156047.

It is an arithmetic number, because the mean of its divisors is an integer number (30823156047).

Almost surely, 2^61646312093 is an apocalyptic number.

It is an amenable number.

61646312093 is a deficient number, since it is larger than the sum of its proper divisors (1).

61646312093 is an equidigital number, since it uses as much as digits as its factorization.

61646312093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 41.

The spelling of 61646312093 in words is "sixty-one billion, six hundred forty-six million, three hundred twelve thousand, ninety-three".