161592510381 has 8 divisors (see below), whose sum is σ = 220711721664. Its totient is φ = 105100819680.

The previous prime is 161592510353. The next prime is 161592510403. The reversal of 161592510381 is 183015295161.

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

It is not a de Polignac number, because 161592510381 - 2⁷ = 161592510253 is a prime.

It is a super-2 number, since 2×161592510381² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161592510281) 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, 656880001 + ... + 656880246.

It is an arithmetic number, because the mean of its divisors is an integer number (27588965208).

Almost surely, 2^161592510381 is an apocalyptic number.

It is an amenable number.

161592510381 is a deficient number, since it is larger than the sum of its proper divisors (59119211283).

161592510381 is a wasteful number, since it uses less digits than its factorization.

161592510381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313760291.

The product of its (nonzero) digits is 64800, while the sum is 42.

It can be divided in two parts, 1615925 and 10381, that added together give a triangular number (1626306 = T₁₈₀₃).

The spelling of 161592510381 in words is "one hundred sixty-one billion, five hundred ninety-two million, five hundred ten thousand, three hundred eighty-one".