161404516 has 24 divisors (see below), whose sum is σ = 347641280. Its totient is φ = 63852192.

The previous prime is 161404493. The next prime is 161404543. The reversal of 161404516 is 615404161.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 221346 + ... + 222073.

Almost surely, 2^161404516 is an apocalyptic number.

It is an amenable number.

161404516 is an abundant number, since it is smaller than the sum of its proper divisors (186236764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161404516 is a wasteful number, since it uses less digits than its factorization.

161404516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443443 (or 443441 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 161404516 is about 12704.5077039608. The cubic root of 161404516 is about 544.4674156381.

Adding to 161404516 its reverse (615404161), we get a palindrome (776808677).

The spelling of 161404516 in words is "one hundred sixty-one million, four hundred four thousand, five hundred sixteen".