61605016617 has 8 divisors (see below), whose sum is σ = 82786794496. Its totient is φ = 40746624912.

The previous prime is 61605016607. The next prime is 61605016657. The reversal of 61605016617 is 71661050616.

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

It is not a de Polignac number, because 61605016617 - 2⁷ = 61605016489 is a prime.

It is a super-2 number, since 2×61605016617² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61605016607) 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, 80846098 + ... + 80846859.

It is an arithmetic number, because the mean of its divisors is an integer number (10348349312).

Almost surely, 2^61605016617 is an apocalyptic number.

It is an amenable number.

61605016617 is a deficient number, since it is larger than the sum of its proper divisors (21181777879).

61605016617 is a wasteful number, since it uses less digits than its factorization.

61605016617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161693087.

The product of its (nonzero) digits is 45360, while the sum is 39.

The spelling of 61605016617 in words is "sixty-one billion, six hundred five million, sixteen thousand, six hundred seventeen".