161698054 has 16 divisors (see below), whose sum is σ = 277678368. Its totient is φ = 69178752.

The previous prime is 161698049. The next prime is 161698057. The reversal of 161698054 is 450896161.

It is a super-2 number, since 2×161698054² = 52292521334773832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161697998 and 161698016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161698057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1437 + ... + 18040.

It is an arithmetic number, because the mean of its divisors is an integer number (17354898).

Almost surely, 2^161698054 is an apocalyptic number.

161698054 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161698054 is a deficient number, since it is larger than the sum of its proper divisors (115980314).

161698054 is a wasteful number, since it uses less digits than its factorization.

161698054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20079.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 161698054 is about 12716.0549699976. The cubic root of 161698054 is about 544.7972806080.

The spelling of 161698054 in words is "one hundred sixty-one million, six hundred ninety-eight thousand, fifty-four".