161337405 has 8 divisors (see below), whose sum is σ = 258139872. Its totient is φ = 86046608.

The previous prime is 161337391. The next prime is 161337413. The reversal of 161337405 is 504733161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161337405 - 2⁷ = 161337277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5377899 + ... + 5377928.

It is an arithmetic number, because the mean of its divisors is an integer number (32267484).

Almost surely, 2^161337405 is an apocalyptic number.

161337405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161337405 is a deficient number, since it is larger than the sum of its proper divisors (96802467).

161337405 is a wasteful number, since it uses less digits than its factorization.

161337405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10755835.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 161337405 is about 12701.8662014682. The cubic root of 161337405 is about 544.3919431149.

The spelling of 161337405 in words is "one hundred sixty-one million, three hundred thirty-seven thousand, four hundred five".