161633854 has 4 divisors (see below), whose sum is σ = 242450784. Its totient is φ = 80816926.

The previous prime is 161633831. The next prime is 161633867. The reversal of 161633854 is 458336161.

161633854 is digitally balanced in base 2 and base 3, because in such bases 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: 458336161 = 883 ⋅519067.

It is a super-2 number, since 2×161633854² = 52251005517786632, which contains 22 as substring.

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, 40408462 + ... + 40408465.

It is an arithmetic number, because the mean of its divisors is an integer number (60612696).

Almost surely, 2^161633854 is an apocalyptic number.

161633854 is a deficient number, since it is larger than the sum of its proper divisors (80816930).

161633854 is an equidigital number, since it uses as much as digits as its factorization.

161633854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80816929.

The product of its digits is 51840, while the sum is 37.

The square root of 161633854 is about 12713.5303515585. The cubic root of 161633854 is about 544.7251696281.

The spelling of 161633854 in words is "one hundred sixty-one million, six hundred thirty-three thousand, eight hundred fifty-four".