61412444662561 has 8 divisors (see below), whose sum is σ = 61444328985000. Its totient is φ = 61380568515840.

The previous prime is 61412444662537. The next prime is 61412444662781. The reversal of 61412444662561 is 16526644421416.

It can be written as a sum of positive squares in 4 ways, for example, as 375960280336 + 61036484382225 = 613156^2 + 7812585^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61412444662561 - 2²⁵ = 61412411108129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61412444662499 and 61412444662508.

It is not an unprimeable number, because it can be changed into a prime (61412444662511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13011865 + ... + 17091913.

It is an arithmetic number, because the mean of its divisors is an integer number (7680541123125).

Almost surely, 2^{61412444662561} is an apocalyptic number.

It is an amenable number.

61412444662561 is a deficient number, since it is larger than the sum of its proper divisors (31884322439).

61412444662561 is a wasteful number, since it uses less digits than its factorization.

61412444662561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4087859.

The product of its digits is 6635520, while the sum is 52.

The spelling of 61412444662561 in words is "sixty-one trillion, four hundred twelve billion, four hundred forty-four million, six hundred sixty-two thousand, five hundred sixty-one".