16409603578 has 16 divisors (see below), whose sum is σ = 24800307840. Its totient is φ = 8142876576.

The previous prime is 16409603569. The next prime is 16409603597. The reversal of 16409603578 is 87530690461.

It is a super-2 number, since 2×16409603578² (a number of 21 digits) contains 22 as substring.

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, 920526 + ... + 938182.

It is an arithmetic number, because the mean of its divisors is an integer number (1550019240).

Almost surely, 2^16409603578 is an apocalyptic number.

16409603578 is a deficient number, since it is larger than the sum of its proper divisors (8390704262).

16409603578 is a wasteful number, since it uses less digits than its factorization.

16409603578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21141.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 16409603578 in words is "sixteen billion, four hundred nine million, six hundred three thousand, five hundred seventy-eight".