171490061661 has 8 divisors (see below), whose sum is σ = 240687805920. Its totient is φ = 108309512592.

The previous prime is 171490061657. The next prime is 171490061669. The reversal of 171490061661 is 166160094171.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 171490061661 - 2² = 171490061657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171490061669) 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, 1504298730 + ... + 1504298843.

It is an arithmetic number, because the mean of its divisors is an integer number (30085975740).

Almost surely, 2^171490061661 is an apocalyptic number.

It is an amenable number.

171490061661 is a deficient number, since it is larger than the sum of its proper divisors (69197744259).

171490061661 is a wasteful number, since it uses less digits than its factorization.

171490061661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3008597595.

The product of its (nonzero) digits is 54432, while the sum is 42.

The spelling of 171490061661 in words is "one hundred seventy-one billion, four hundred ninety million, sixty-one thousand, six hundred sixty-one".