161376461 has 4 divisors (see below), whose sum is σ = 170869212. Its totient is φ = 151883712.

The previous prime is 161376419. The next prime is 161376469. The reversal of 161376461 is 164673161.

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 60996100 + 100380361 = 7810^2 + 10019^2 .

It is not a de Polignac number, because 161376461 - 2²⁶ = 94267597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161376469) 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, 4746350 + ... + 4746383.

It is an arithmetic number, because the mean of its divisors is an integer number (42717303).

Almost surely, 2^161376461 is an apocalyptic number.

It is an amenable number.

161376461 is a deficient number, since it is larger than the sum of its proper divisors (9492751).

161376461 is an equidigital number, since it uses as much as digits as its factorization.

161376461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9492750.

The product of its digits is 18144, while the sum is 35.

The square root of 161376461 is about 12703.4035203169. The cubic root of 161376461 is about 544.4358677425.

The spelling of 161376461 in words is "one hundred sixty-one million, three hundred seventy-six thousand, four hundred sixty-one".