61617544558371 has 6 divisors (see below), whose sum is σ = 89003119917660. Its totient is φ = 41078363038908.

The previous prime is 61617544558357. The next prime is 61617544558397. The reversal of 61617544558371 is 17385544571616.

61617544558371 is a `hidden beast` number, since 6 + 1 + 6 + 1 + 7 + 5 + 4 + 4 + 558 + 3 + 71 = 666.

It is not a de Polignac number, because 61617544558371 - 2⁶ = 61617544558307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61617544558299 and 61617544558308.

It is not an unprimeable number, because it can be changed into a prime (61617544558301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3423196919901 + ... + 3423196919918.

It is an arithmetic number, because the mean of its divisors is an integer number (14833853319610).

Almost surely, 2^{61617544558371} is an apocalyptic number.

61617544558371 is a deficient number, since it is larger than the sum of its proper divisors (27385575359289).

61617544558371 is a wasteful number, since it uses less digits than its factorization.

61617544558371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6846393839825 (or 6846393839822 counting only the distinct ones).

The product of its digits is 84672000, while the sum is 63.

The spelling of 61617544558371 in words is "sixty-one trillion, six hundred seventeen billion, five hundred forty-four million, five hundred fifty-eight thousand, three hundred seventy-one".