16161607578 has 8 divisors (see below), whose sum is σ = 32323215168. Its totient is φ = 5387202524.

The previous prime is 16161607559. The next prime is 16161607589. The reversal of 16161607578 is 87570616161.

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

16161607578 is an admirable number.

It is a super-2 number, since 2×16161607578² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1346800626 + ... + 1346800637.

It is an arithmetic number, because the mean of its divisors is an integer number (4040401896).

Almost surely, 2^16161607578 is an apocalyptic number.

16161607578 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16161607578 is a wasteful number, since it uses less digits than its factorization.

16161607578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693601268.

The product of its (nonzero) digits is 423360, while the sum is 48.

The spelling of 16161607578 in words is "sixteen billion, one hundred sixty-one million, six hundred seven thousand, five hundred seventy-eight".