61717217363 has 4 divisors (see below), whose sum is σ = 61718059608. Its totient is φ = 61716375120.

The previous prime is 61717217351. The next prime is 61717217383. The reversal of 61717217363 is 36371271716.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61717217363 - 2¹⁶ = 61717151827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61717217383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299498 + ... + 461663.

It is an arithmetic number, because the mean of its divisors is an integer number (15429514902).

Almost surely, 2^61717217363 is an apocalyptic number.

61717217363 is a deficient number, since it is larger than the sum of its proper divisors (842245).

61717217363 is an equidigital number, since it uses as much as digits as its factorization.

61717217363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842244.

The product of its digits is 222264, while the sum is 44.

The spelling of 61717217363 in words is "sixty-one billion, seven hundred seventeen million, two hundred seventeen thousand, three hundred sixty-three".