816118628850 has 144 divisors (see below), whose sum is σ = 2507043913920. Its totient is φ = 186454224000.

The previous prime is 816118628833. The next prime is 816118628959. The reversal of 816118628850 is 58826811618.

816118628850 is a `hidden beast` number, since 8 + 1 + 6 + 1 + 1 + 8 + 628 + 8 + 5 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6804400 + ... + 6923300.

It is an arithmetic number, because the mean of its divisors is an integer number (17410027180).

Almost surely, 2^816118628850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 816118628850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1253521956960).

816118628850 is an abundant number, since it is smaller than the sum of its proper divisors (1690925285070).

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

816118628850 is a wasteful number, since it uses less digits than its factorization.

816118628850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121105 (or 121097 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 54.

The spelling of 816118628850 in words is "eight hundred sixteen billion, one hundred eighteen million, six hundred twenty-eight thousand, eight hundred fifty".