61617217642659 has 48 divisors (see below), whose sum is σ = 101994019725312. Its totient is φ = 35114062538304.

The previous prime is 61617217642649. The next prime is 61617217642781. The reversal of 61617217642659 is 95624671271616.

61617217642659 is a `hidden beast` number, since 6 + 1 + 617 + 2 + 1 + 7 + 6 + 4 + 2 + 6 + 5 + 9 = 666.

It is not a de Polignac number, because 61617217642659 - 2²⁰ = 61617216594083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 61617217642596 and 61617217642605.

It is not an unprimeable number, because it can be changed into a prime (61617217642649) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1078270042 + ... + 1078327184.

It is an arithmetic number, because the mean of its divisors is an integer number (2124875410944).

Almost surely, 2^{61617217642659} is an apocalyptic number.

61617217642659 is a deficient number, since it is larger than the sum of its proper divisors (40376802082653).

61617217642659 is a wasteful number, since it uses less digits than its factorization.

61617217642659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103416 (or 103413 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 61617217642659 in words is "sixty-one trillion, six hundred seventeen billion, two hundred seventeen million, six hundred forty-two thousand, six hundred fifty-nine".