61717217364 has 72 divisors (see below), whose sum is σ = 170283099168. Its totient is φ = 18691945920.

The previous prime is 61717217351. The next prime is 61717217383. The reversal of 61717217364 is 46371271716.

61717217364 is a `hidden beast` number, since 6 + 1 + 71 + 7 + 217 + 364 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 697594 + ... + 781070.

It is an arithmetic number, because the mean of its divisors is an integer number (2365043044).

Almost surely, 2^61717217364 is an apocalyptic number.

It is an amenable number.

61717217364 is an abundant number, since it is smaller than the sum of its proper divisors (108565881804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61717217364 is a wasteful number, since it uses less digits than its factorization.

61717217364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85365 (or 85360 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The spelling of 61717217364 in words is "sixty-one billion, seven hundred seventeen million, two hundred seventeen thousand, three hundred sixty-four".