161655694 has 4 divisors (see below), whose sum is σ = 242483544. Its totient is φ = 80827846.

The previous prime is 161655677. The next prime is 161655709. The reversal of 161655694 is 496556161.

161655694 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.

It is a super-2 number, since 2×161655694² = 52265126805243272, 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 161655694.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40413922 + ... + 40413925.

It is an arithmetic number, because the mean of its divisors is an integer number (60620886).

Almost surely, 2^161655694 is an apocalyptic number.

161655694 is a deficient number, since it is larger than the sum of its proper divisors (80827850).

161655694 is an equidigital number, since it uses as much as digits as its factorization.

161655694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80827849.

The product of its digits is 194400, while the sum is 43.

The square root of 161655694 is about 12714.3892499797. The cubic root of 161655694 is about 544.7497029826.

The spelling of 161655694 in words is "one hundred sixty-one million, six hundred fifty-five thousand, six hundred ninety-four".