61064317571 has 4 divisors (see below), whose sum is σ = 61296501552. Its totient is φ = 60832133592.

The previous prime is 61064317549. The next prime is 61064317597. The reversal of 61064317571 is 17571346016.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61064317571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61064317541) 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, 116091596 + ... + 116092121.

It is an arithmetic number, because the mean of its divisors is an integer number (15324125388).

Almost surely, 2^61064317571 is an apocalyptic number.

61064317571 is a deficient number, since it is larger than the sum of its proper divisors (232183981).

61064317571 is a wasteful number, since it uses less digits than its factorization.

61064317571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232183980.

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 61064317571 in words is "sixty-one billion, sixty-four million, three hundred seventeen thousand, five hundred seventy-one".