161574711671 has 8 divisors (see below), whose sum is σ = 162158636640. Its totient is φ = 160991405568.

The previous prime is 161574711611. The next prime is 161574711677. The reversal of 161574711671 is 176117475161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161574711671 is a prime.

It is a super-2 number, since 2×161574711671² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161574711677) 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, 371615 + ... + 679151.

It is an arithmetic number, because the mean of its divisors is an integer number (20269829580).

Almost surely, 2^161574711671 is an apocalyptic number.

161574711671 is a deficient number, since it is larger than the sum of its proper divisors (583924969).

161574711671 is a wasteful number, since it uses less digits than its factorization.

161574711671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309433.

The product of its digits is 246960, while the sum is 47.

The spelling of 161574711671 in words is "one hundred sixty-one billion, five hundred seventy-four million, seven hundred eleven thousand, six hundred seventy-one".