61446442261 has 4 divisors (see below), whose sum is σ = 61453247724. Its totient is φ = 61439636800.

The previous prime is 61446442229. The next prime is 61446442297. The reversal of 61446442261 is 16224464416.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54302980900 + 7143461361 = 233030^2 + 84519^2 .

It is a cyclic number.

It is not a de Polignac number, because 61446442261 - 2⁵ = 61446442229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61446442661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3389170 + ... + 3407251.

It is an arithmetic number, because the mean of its divisors is an integer number (15363311931).

Almost surely, 2^61446442261 is an apocalyptic number.

It is an amenable number.

61446442261 is a deficient number, since it is larger than the sum of its proper divisors (6805463).

61446442261 is an equidigital number, since it uses as much as digits as its factorization.

61446442261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6805462.

The product of its digits is 221184, while the sum is 40.

The spelling of 61446442261 in words is "sixty-one billion, four hundred forty-six million, four hundred forty-two thousand, two hundred sixty-one".