77805050250 has 64 divisors (see below), whose sum is σ = 194516300160. Its totient is φ = 20714371200.

The previous prime is 77805050249. The next prime is 77805050251. The reversal of 77805050250 is 5205050877.

It is an interprime number because it is at equal distance from previous prime (77805050249) and next prime (77805050251).

It is a junction number, because it is equal to n+sod(n) for n = 77805050199 and 77805050208.

It is not an unprimeable number, because it can be changed into a prime (77805050251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 380454 + ... + 548046.

It is an arithmetic number, because the mean of its divisors is an integer number (3039317190).

Almost surely, 2^77805050250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77805050250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97258150080).

77805050250 is an abundant number, since it is smaller than the sum of its proper divisors (116711249910).

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

77805050250 is a wasteful number, since it uses less digits than its factorization.

77805050250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168232 (or 168222 counting only the distinct ones).

The product of its (nonzero) digits is 98000, while the sum is 39.

The spelling of 77805050250 in words is "seventy-seven billion, eight hundred five million, fifty thousand, two hundred fifty".