819378192850 has 48 divisors (see below), whose sum is σ = 1757177854848. Its totient is φ = 278443549440.

The previous prime is 819378192833. The next prime is 819378192863. The reversal of 819378192850 is 58291873918.

It is a super-2 number, since 2×819378192850² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10319214 + ... + 10398313.

It is an arithmetic number, because the mean of its divisors is an integer number (36607871976).

Almost surely, 2^819378192850 is an apocalyptic number.

819378192850 is an abundant number, since it is smaller than the sum of its proper divisors (937799661998).

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

819378192850 is a wasteful number, since it uses less digits than its factorization.

819378192850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20717659 (or 20717654 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 61.

The spelling of 819378192850 in words is "eight hundred nineteen billion, three hundred seventy-eight million, one hundred ninety-two thousand, eight hundred fifty".