802251778050 has 54 divisors (see below), whose sum is σ = 2155434159177. Its totient is φ = 213928740720.

The previous prime is 802251777989. The next prime is 802251778051. The reversal of 802251778050 is 50877152208.

802251778050 is a `hidden beast` number, since 8 + 0 + 2 + 2 + 517 + 7 + 80 + 50 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 786206742489 + 16045035561 = 886683^2 + 126669^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=633345.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 802251777987 and 802251778005.

It is not an unprimeable number, because it can be changed into a prime (802251778051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 18979239 + ... + 19021461.

Almost surely, 2^802251778050 is an apocalyptic number.

802251778050 is an abundant number, since it is smaller than the sum of its proper divisors (1353182381127).

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

802251778050 is an frugal number, since it uses more digits than its factorization.

802251778050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84464 (or 42233 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 45.

The spelling of 802251778050 in words is "eight hundred two billion, two hundred fifty-one million, seven hundred seventy-eight thousand, fifty".