61723173671 has 16 divisors (see below), whose sum is σ = 66475680000. Its totient is φ = 57189742848.

The previous prime is 61723173667. The next prime is 61723173683. The reversal of 61723173671 is 17637132716.

It is a cyclic number.

It is not a de Polignac number, because 61723173671 - 2² = 61723173667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61723173371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315671 + ... + 472328.

It is an arithmetic number, because the mean of its divisors is an integer number (4154730000).

Almost surely, 2^61723173671 is an apocalyptic number.

61723173671 is a deficient number, since it is larger than the sum of its proper divisors (4752506329).

61723173671 is a wasteful number, since it uses less digits than its factorization.

61723173671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788138.

The product of its digits is 222264, while the sum is 44.

The spelling of 61723173671 in words is "sixty-one billion, seven hundred twenty-three million, one hundred seventy-three thousand, six hundred seventy-one".