61657171718328 has 96 divisors (see below), whose sum is σ = 169761394857600. Its totient is φ = 20213834739264.

The previous prime is 61657171718293. The next prime is 61657171718353. The reversal of 61657171718328 is 82381717175616.

61657171718328 is a `hidden beast` number, since 6 + 1 + 6 + 571 + 7 + 17 + 18 + 32 + 8 = 666.

It is a super-2 number, since 2×61657171718328² (a number of 28 digits) contains 22 as substring.

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, 27717876 + ... + 29859587.

It is an arithmetic number, because the mean of its divisors is an integer number (1768347863100).

Almost surely, 2^{61657171718328} is an apocalyptic number.

It is an amenable number.

61657171718328 is an abundant number, since it is smaller than the sum of its proper divisors (108104223139272).

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

61657171718328 is a wasteful number, since it uses less digits than its factorization.

61657171718328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57577721 (or 57577714 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 63.

The spelling of 61657171718328 in words is "sixty-one trillion, six hundred fifty-seven billion, one hundred seventy-one million, seven hundred eighteen thousand, three hundred twenty-eight".