161485437 has 4 divisors (see below), whose sum is σ = 215313920. Its totient is φ = 107656956.

The previous prime is 161485433. The next prime is 161485459. The reversal of 161485437 is 734584161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 161485437 - 2² = 161485433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161485395 and 161485404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161485433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26914237 + ... + 26914242.

It is an arithmetic number, because the mean of its divisors is an integer number (53828480).

Almost surely, 2^161485437 is an apocalyptic number.

It is an amenable number.

161485437 is a deficient number, since it is larger than the sum of its proper divisors (53828483).

161485437 is an equidigital number, since it uses as much as digits as its factorization.

161485437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53828482.

The product of its digits is 80640, while the sum is 39.

The square root of 161485437 is about 12707.6920406500. The cubic root of 161485437 is about 544.5583909669.

The spelling of 161485437 in words is "one hundred sixty-one million, four hundred eighty-five thousand, four hundred thirty-seven".