61165650761 has 2 divisors, whose sum is σ = 61165650762. Its totient is φ = 61165650760.

The previous prime is 61165650757. The next prime is 61165650809. The reversal of 61165650761 is 16705656116.

61165650761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59263033600 + 1902617161 = 243440^2 + 43619^2 .

It is a cyclic number.

It is not a de Polignac number, because 61165650761 - 2² = 61165650757 is a prime.

It is not a weakly prime, because it can be changed into another prime (61165658761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30582825380 + 30582825381.

It is an arithmetic number, because the mean of its divisors is an integer number (30582825381).

Almost surely, 2^61165650761 is an apocalyptic number.

It is an amenable number.

61165650761 is a deficient number, since it is larger than the sum of its proper divisors (1).

61165650761 is an equidigital number, since it uses as much as digits as its factorization.

61165650761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 61165650761 in words is "sixty-one billion, one hundred sixty-five million, six hundred fifty thousand, seven hundred sixty-one".