161655134 has 4 divisors (see below), whose sum is σ = 242482704. Its totient is φ = 80827566.

The previous prime is 161655133. The next prime is 161655149. The reversal of 161655134 is 431556161.

161655134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 431556161 = 3793 ⋅113777.

It is a super-2 number, since 2×161655134² = 52264764697115912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161655134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161655133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40413782 + ... + 40413785.

It is an arithmetic number, because the mean of its divisors is an integer number (60620676).

Almost surely, 2^161655134 is an apocalyptic number.

161655134 is a deficient number, since it is larger than the sum of its proper divisors (80827570).

161655134 is an equidigital number, since it uses as much as digits as its factorization.

161655134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80827569.

The product of its digits is 10800, while the sum is 32.

The square root of 161655134 is about 12714.3672276681. The cubic root of 161655134 is about 544.7490739498.

The spelling of 161655134 in words is "one hundred sixty-one million, six hundred fifty-five thousand, one hundred thirty-four".