101640889697 has 2 divisors, whose sum is σ = 101640889698. Its totient is φ = 101640889696.

The previous prime is 101640889663. The next prime is 101640889771. The reversal of 101640889697 is 796988046101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63193915456 + 38446974241 = 251384^2 + 196079^2 .

It is a cyclic number.

It is not a de Polignac number, because 101640889697 - 2³⁰ = 100567147873 is a prime.

It is not a weakly prime, because it can be changed into another prime (101640883697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50820444848 + 50820444849.

It is an arithmetic number, because the mean of its divisors is an integer number (50820444849).

Almost surely, 2^101640889697 is an apocalyptic number.

It is an amenable number.

101640889697 is a deficient number, since it is larger than the sum of its proper divisors (1).

101640889697 is an equidigital number, since it uses as much as digits as its factorization.

101640889697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 59.

The spelling of 101640889697 in words is "one hundred one billion, six hundred forty million, eight hundred eighty-nine thousand, six hundred ninety-seven".