61044506221 has 2 divisors, whose sum is σ = 61044506222. Its totient is φ = 61044506220.

The previous prime is 61044506183. The next prime is 61044506233. The reversal of 61044506221 is 12260544016.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42950490025 + 18094016196 = 207245^2 + 134514^2 .

It is a cyclic number.

It is not a de Polignac number, because 61044506221 - 2²¹ = 61042409069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61044504221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30522253110 + 30522253111.

It is an arithmetic number, because the mean of its divisors is an integer number (30522253111).

Almost surely, 2^61044506221 is an apocalyptic number.

It is an amenable number.

61044506221 is a deficient number, since it is larger than the sum of its proper divisors (1).

61044506221 is an equidigital number, since it uses as much as digits as its factorization.

61044506221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 61044506221 in words is "sixty-one billion, forty-four million, five hundred six thousand, two hundred twenty-one".