161154434 has 32 divisors (see below), whose sum is σ = 283132800. Its totient is φ = 68765424.

The previous prime is 161154401. The next prime is 161154437. The reversal of 161154434 is 434451161.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161154397 and 161154406.

It is not an unprimeable number, because it can be changed into a prime (161154437) 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 15 ways as a sum of consecutive naturals, for example, 237704 + ... + 238380.

It is an arithmetic number, because the mean of its divisors is an integer number (8847900).

Almost surely, 2^161154434 is an apocalyptic number.

161154434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161154434 is a deficient number, since it is larger than the sum of its proper divisors (121978366).

161154434 is an equidigital number, since it uses as much as digits as its factorization.

161154434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047 (or 1033 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 161154434 is about 12694.6616339310. The cubic root of 161154434 is about 544.1860689372.

The spelling of 161154434 in words is "one hundred sixty-one million, one hundred fifty-four thousand, four hundred thirty-four".