161552104774106 has 4 divisors (see below), whose sum is σ = 242328157161162. Its totient is φ = 80776052387052.

The previous prime is 161552104774079. The next prime is 161552104774153. The reversal of 161552104774106 is 601477401255161.

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

It can be written as a sum of positive squares in only one way, i.e., 95498140459225 + 66053964314881 = 9772315^2 + 8127359^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40388026193525 + ... + 40388026193528.

Almost surely, 2^{161552104774106} is an apocalyptic number.

161552104774106 is a deficient number, since it is larger than the sum of its proper divisors (80776052387056).

161552104774106 is an equidigital number, since it uses as much as digits as its factorization.

161552104774106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80776052387055.

The product of its (nonzero) digits is 1411200, while the sum is 50.

The spelling of 161552104774106 in words is "one hundred sixty-one trillion, five hundred fifty-two billion, one hundred four million, seven hundred seventy-four thousand, one hundred six".