161210175632431 has 16 divisors (see below), whose sum is σ = 168769081625760. Its totient is φ = 153849099156480.

The previous prime is 161210175632419. The next prime is 161210175632459. The reversal of 161210175632431 is 134236571012161.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 161210175632431 - 2¹⁵ = 161210175599663 is a prime.

It is a super-2 number, since 2×161210175632431² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161210175636431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146208526 + ... + 147307003.

It is an arithmetic number, because the mean of its divisors is an integer number (10548067601610).

Almost surely, 2^{161210175632431} is an apocalyptic number.

161210175632431 is a deficient number, since it is larger than the sum of its proper divisors (7558905993329).

161210175632431 is a wasteful number, since it uses less digits than its factorization.

161210175632431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293515866.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 161210175632431 in words is "one hundred sixty-one trillion, two hundred ten billion, one hundred seventy-five million, six hundred thirty-two thousand, four hundred thirty-one".