77327798499 has 48 divisors (see below), whose sum is σ = 132573692160. Its totient is φ = 44122695840.

The previous prime is 77327798497. The next prime is 77327798539. The reversal of 77327798499 is 99489772377.

77327798499 is a `hidden beast` number, since 77 + 327 + 79 + 84 + 99 = 666.

It is not a de Polignac number, because 77327798499 - 2¹ = 77327798497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77327798491) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1142497 + ... + 1208285.

It is an arithmetic number, because the mean of its divisors is an integer number (2761951920).

Almost surely, 2^77327798499 is an apocalyptic number.

77327798499 is a deficient number, since it is larger than the sum of its proper divisors (55245893661).

77327798499 is an equidigital number, since it uses as much as digits as its factorization.

77327798499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66502 (or 66490 counting only the distinct ones).

The product of its digits is 336063168, while the sum is 72.

It can be divided in two parts, 77327 and 798499, that added together give a triangular number (875826 = T₁₃₂₃).

The spelling of 77327798499 in words is "seventy-seven billion, three hundred twenty-seven million, seven hundred ninety-eight thousand, four hundred ninety-nine".