161377045 has 8 divisors (see below), whose sum is σ = 193815000. Its totient is φ = 128993280.

The previous prime is 161377043. The next prime is 161377049. The reversal of 161377045 is 540773161.

It can be written as a sum of positive squares in 4 ways, for example, as 3849444 + 157527601 = 1962^2 + 12551^2 .

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

It is not a de Polignac number, because 161377045 - 2¹ = 161377043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161377045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161377043) 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, 6676 + ... + 19165.

It is an arithmetic number, because the mean of its divisors is an integer number (24226875).

Almost surely, 2^161377045 is an apocalyptic number.

It is an amenable number.

161377045 is a deficient number, since it is larger than the sum of its proper divisors (32437955).

161377045 is a wasteful number, since it uses less digits than its factorization.

161377045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27095.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 161377045 is about 12703.4265062620. The cubic root of 161377045 is about 544.4365244887.

The spelling of 161377045 in words is "one hundred sixty-one million, three hundred seventy-seven thousand, forty-five".