61657171717305 has 8 divisors (see below), whose sum is σ = 98651474747712. Its totient is φ = 32883824915888.

The previous prime is 61657171717213. The next prime is 61657171717313. The reversal of 61657171717305 is 50371717175616.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61657171717305 - 2¹³ = 61657171709113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2055239057229 + ... + 2055239057258.

It is an arithmetic number, because the mean of its divisors is an integer number (12331434343464).

Almost surely, 2^{61657171717305} is an apocalyptic number.

It is an amenable number.

61657171717305 is a deficient number, since it is larger than the sum of its proper divisors (36994303030407).

61657171717305 is a wasteful number, since it uses less digits than its factorization.

61657171717305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4110478114495.

The product of its (nonzero) digits is 6482700, while the sum is 57.

The spelling of 61657171717305 in words is "sixty-one trillion, six hundred fifty-seven billion, one hundred seventy-one million, seven hundred seventeen thousand, three hundred five".