61723956171 has 8 divisors (see below), whose sum is σ = 82301359824. Its totient is φ = 41147928320.

The previous prime is 61723956169. The next prime is 61723956211. The reversal of 61723956171 is 17165932716.

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 61723956171 - 2¹ = 61723956169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61723956171.

It is not an unprimeable number, because it can be changed into a prime (61723956971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234270 + ... + 422291.

It is an arithmetic number, because the mean of its divisors is an integer number (10287669978).

Almost surely, 2^61723956171 is an apocalyptic number.

61723956171 is a deficient number, since it is larger than the sum of its proper divisors (20577403653).

61723956171 is a wasteful number, since it uses less digits than its factorization.

61723956171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687901.

The product of its digits is 476280, while the sum is 48.

The spelling of 61723956171 in words is "sixty-one billion, seven hundred twenty-three million, nine hundred fifty-six thousand, one hundred seventy-one".