61232220909 has 6 divisors (see below), whose sum is σ = 88446541326. Its totient is φ = 40821480600.

The previous prime is 61232220887. The next prime is 61232220953. The reversal of 61232220909 is 90902223216.

61232220909 is a `hidden beast` number, since 612 + 32 + 2 + 2 + 0 + 9 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 41140008900 + 20092212009 = 202830^2 + 141747^2 .

It is not a de Polignac number, because 61232220909 - 2⁹ = 61232220397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61232220109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3401790042 + ... + 3401790059.

It is an arithmetic number, because the mean of its divisors is an integer number (14741090221).

Almost surely, 2^61232220909 is an apocalyptic number.

It is an amenable number.

61232220909 is a deficient number, since it is larger than the sum of its proper divisors (27214320417).

61232220909 is a wasteful number, since it uses less digits than its factorization.

61232220909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6803580107 (or 6803580104 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 61232220909 in words is "sixty-one billion, two hundred thirty-two million, two hundred twenty thousand, nine hundred nine".