161004704 has 96 divisors (see below), whose sum is σ = 380007936. Its totient is φ = 65710080.

The previous prime is 161004691. The next prime is 161004707. The reversal of 161004704 is 407400161.

It is a self number, because there is not a number n which added to its sum of digits gives 161004704.

It is not an unprimeable number, because it can be changed into a prime (161004707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431462 + ... + 431834.

It is an arithmetic number, because the mean of its divisors is an integer number (3958416).

Almost surely, 2^161004704 is an apocalyptic number.

161004704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161004704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190003968).

161004704 is an abundant number, since it is smaller than the sum of its proper divisors (219003232).

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

161004704 is a wasteful number, since it uses less digits than its factorization.

161004704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 161004704 is about 12688.7629026631. The cubic root of 161004704 is about 544.0174806955.

Adding to 161004704 its reverse (407400161), we get a palindrome (568404865).

The spelling of 161004704 in words is "one hundred sixty-one million, four thousand, seven hundred four".