77327798500 has 48 divisors (see below), whose sum is σ = 173448383472. Its totient is φ = 30095136000.

The previous prime is 77327798497. The next prime is 77327798539. The reversal of 77327798500 is 589772377.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 8750854116 + 68576944384 = 93546^2 + 261872^2 .

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2071441 + ... + 2108440.

It is an arithmetic number, because the mean of its divisors is an integer number (3613507989).

Almost surely, 2^77327798500 is an apocalyptic number.

It is an amenable number.

77327798500 is an abundant number, since it is smaller than the sum of its proper divisors (96120584972).

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

77327798500 is a wasteful number, since it uses less digits than its factorization.

77327798500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179937 (or 4179925 counting only the distinct ones).

The product of its (nonzero) digits is 5186160, while the sum is 55.

The spelling of 77327798500 in words is "seventy-seven billion, three hundred twenty-seven million, seven hundred ninety-eight thousand, five hundred".