16536510978 has 32 divisors (see below), whose sum is σ = 36766044672. Its totient is φ = 4924022400.

The previous prime is 16536510967. The next prime is 16536511001. The reversal of 16536510978 is 87901563561.

It is a self number, because there is not a number n which added to its sum of digits gives 16536510978.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3417043 + ... + 3421878.

It is an arithmetic number, because the mean of its divisors is an integer number (1148938896).

Almost surely, 2^16536510978 is an apocalyptic number.

16536510978 is an abundant number, since it is smaller than the sum of its proper divisors (20229533694).

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

16536510978 is a wasteful number, since it uses less digits than its factorization.

16536510978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6838970.

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 16536510978 in words is "sixteen billion, five hundred thirty-six million, five hundred ten thousand, nine hundred seventy-eight".