61479398417 has 8 divisors (see below), whose sum is σ = 65106124776. Its totient is φ = 57853815552.

The previous prime is 61479398401. The next prime is 61479398423. The reversal of 61479398417 is 71489397416.

It can be written as a sum of positive squares in 4 ways, for example, as 2430884416 + 59048514001 = 49304^2 + 242999^2 .

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 61479398417 - 2⁴ = 61479398401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61479398317) 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, 173918 + ... + 391415.

It is an arithmetic number, because the mean of its divisors is an integer number (8138265597).

Almost surely, 2^61479398417 is an apocalyptic number.

It is an amenable number.

61479398417 is a deficient number, since it is larger than the sum of its proper divisors (3626726359).

61479398417 is a wasteful number, since it uses less digits than its factorization.

61479398417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571747.

The product of its digits is 9144576, while the sum is 59.

The spelling of 61479398417 in words is "sixty-one billion, four hundred seventy-nine million, three hundred ninety-eight thousand, four hundred seventeen".