61165736893 has 2 divisors, whose sum is σ = 61165736894. Its totient is φ = 61165736892.

The previous prime is 61165736869. The next prime is 61165737007. The reversal of 61165736893 is 39863756116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34019220249 + 27146516644 = 184443^2 + 164762^2 .

It is a cyclic number.

It is not a de Polignac number, because 61165736893 - 2⁵ = 61165736861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61165736813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30582868446 + 30582868447.

It is an arithmetic number, because the mean of its divisors is an integer number (30582868447).

Almost surely, 2^61165736893 is an apocalyptic number.

It is an amenable number.

61165736893 is a deficient number, since it is larger than the sum of its proper divisors (1).

61165736893 is an equidigital number, since it uses as much as digits as its factorization.

61165736893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 55.

The spelling of 61165736893 in words is "sixty-one billion, one hundred sixty-five million, seven hundred thirty-six thousand, eight hundred ninety-three".