61650206205 has 64 divisors (see below), whose sum is σ = 121190031360. Its totient is φ = 26131521024.

The previous prime is 61650206201. The next prime is 61650206207. The reversal of 61650206205 is 50260205616.

It is a happy number.

It is not a de Polignac number, because 61650206205 - 2² = 61650206201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61650206201) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 234984 + ... + 422513.

It is an arithmetic number, because the mean of its divisors is an integer number (1893594240).

Almost surely, 2^61650206205 is an apocalyptic number.

It is an amenable number.

61650206205 is a deficient number, since it is larger than the sum of its proper divisors (59539825155).

61650206205 is a wasteful number, since it uses less digits than its factorization.

61650206205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657578.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 61650206205 in words is "sixty-one billion, six hundred fifty million, two hundred six thousand, two hundred five".