16578985377 has 16 divisors (see below), whose sum is σ = 22655969280. Its totient is φ = 10777603200.

The previous prime is 16578985337. The next prime is 16578985391. The reversal of 16578985377 is 77358987561.

It is not a de Polignac number, because 16578985377 - 2⁸ = 16578985121 is a prime.

It is a super-2 number, since 2×16578985377² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16578985307) 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, 216352 + ... + 282782.

It is an arithmetic number, because the mean of its divisors is an integer number (1415998080).

Almost surely, 2^16578985377 is an apocalyptic number.

It is an amenable number.

16578985377 is a deficient number, since it is larger than the sum of its proper divisors (6076983903).

16578985377 is a wasteful number, since it uses less digits than its factorization.

16578985377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68504.

The product of its digits is 88905600, while the sum is 66.

The spelling of 16578985377 in words is "sixteen billion, five hundred seventy-eight million, nine hundred eighty-five thousand, three hundred seventy-seven".