161856922327 has 8 divisors (see below), whose sum is σ = 172469499696. Its totient is φ = 151365631872.

The previous prime is 161856922303. The next prime is 161856922343. The reversal of 161856922327 is 723229658161.

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 161856922327 - 2¹¹ = 161856920279 is a prime.

It is a super-2 number, since 2×161856922327² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161856922127) 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, 30318973 + ... + 30324310.

It is an arithmetic number, because the mean of its divisors is an integer number (21558687462).

Almost surely, 2^161856922327 is an apocalyptic number.

161856922327 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

161856922327 is a deficient number, since it is larger than the sum of its proper divisors (10612577369).

161856922327 is a wasteful number, since it uses less digits than its factorization.

161856922327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60643457.

The product of its digits is 2177280, while the sum is 52.

The spelling of 161856922327 in words is "one hundred sixty-one billion, eight hundred fifty-six million, nine hundred twenty-two thousand, three hundred twenty-seven".