101864695661 has 2 divisors, whose sum is σ = 101864695662. Its totient is φ = 101864695660.

The previous prime is 101864695577. The next prime is 101864695717. The reversal of 101864695661 is 166596468101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101247421636 + 617274025 = 318194^2 + 24845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101864695661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101864595661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50932347830 + 50932347831.

It is an arithmetic number, because the mean of its divisors is an integer number (50932347831).

Almost surely, 2^101864695661 is an apocalyptic number.

It is an amenable number.

101864695661 is a deficient number, since it is larger than the sum of its proper divisors (1).

101864695661 is an equidigital number, since it uses as much as digits as its factorization.

101864695661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 101864695661 in words is "one hundred one billion, eight hundred sixty-four million, six hundred ninety-five thousand, six hundred sixty-one".