61617544171 has 6 divisors (see below), whose sum is σ = 63157068116. Its totient is φ = 60114675600.

The previous prime is 61617544091. The next prime is 61617544181. The reversal of 61617544171 is 17144571616.

It is not a de Polignac number, because 61617544171 - 2¹¹ = 61617542123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61617544181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18325965 + ... + 18329326.

Almost surely, 2^61617544171 is an apocalyptic number.

61617544171 is a deficient number, since it is larger than the sum of its proper divisors (1539523945).

61617544171 is an equidigital number, since it uses as much as digits as its factorization.

61617544171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36655373 (or 36655332 counting only the distinct ones).

The product of its digits is 141120, while the sum is 43.

The spelling of 61617544171 in words is "sixty-one billion, six hundred seventeen million, five hundred forty-four thousand, one hundred seventy-one".