61513071227668 has 6 divisors (see below), whose sum is σ = 107647874648426. Its totient is φ = 30756535613832.

The previous prime is 61513071227627. The next prime is 61513071227677. The reversal of 61513071227668 is 86672217031516.

It can be written as a sum of positive squares in only one way, i.e., 49648201637904 + 11864869589764 = 7046148^2 + 3444542^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7689133903455 + ... + 7689133903462.

Almost surely, 2^{61513071227668} is an apocalyptic number.

It is an amenable number.

61513071227668 is a deficient number, since it is larger than the sum of its proper divisors (46134803420758).

61513071227668 is a wasteful number, since it uses less digits than its factorization.

61513071227668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15378267806921 (or 15378267806919 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 61513071227668 in words is "sixty-one trillion, five hundred thirteen billion, seventy-one million, two hundred twenty-seven thousand, six hundred sixty-eight".