161846537 has 4 divisors (see below), whose sum is σ = 163515156. Its totient is φ = 160177920.

The previous prime is 161846527. The next prime is 161846549. The reversal of 161846537 is 735648161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 104632441 + 57214096 = 10229^2 + 7564^2 .

It is a cyclic number.

It is not a de Polignac number, because 161846537 - 2¹⁸ = 161584393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161846494 and 161846503.

It is not an unprimeable number, because it can be changed into a prime (161846527) 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, 834164 + ... + 834357.

It is an arithmetic number, because the mean of its divisors is an integer number (40878789).

Almost surely, 2^161846537 is an apocalyptic number.

It is an amenable number.

161846537 is a deficient number, since it is larger than the sum of its proper divisors (1668619).

161846537 is an equidigital number, since it uses as much as digits as its factorization.

161846537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668618.

The product of its digits is 120960, while the sum is 41.

The square root of 161846537 is about 12721.8920369574. The cubic root of 161846537 is about 544.9639871835.

It can be divided in two parts, 16 and 1846537, that multiplied together give a palindrome (29544592).

The spelling of 161846537 in words is "one hundred sixty-one million, eight hundred forty-six thousand, five hundred thirty-seven".