61478168565 has 32 divisors (see below), whose sum is σ = 107318877696. Its totient is φ = 29804394560.

The previous prime is 61478168513. The next prime is 61478168597. The reversal of 61478168565 is 56586187416.

It is not a de Polignac number, because 61478168565 - 2¹² = 61478164469 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2416642 + ... + 2441948.

It is an arithmetic number, because the mean of its divisors is an integer number (3353714928).

Almost surely, 2^61478168565 is an apocalyptic number.

It is an amenable number.

61478168565 is a deficient number, since it is larger than the sum of its proper divisors (45840709131).

61478168565 is a wasteful number, since it uses less digits than its factorization.

61478168565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40049.

The product of its digits is 9676800, while the sum is 57.

The spelling of 61478168565 in words is "sixty-one billion, four hundred seventy-eight million, one hundred sixty-eight thousand, five hundred sixty-five".