6536636478 has 96 divisors (see below), whose sum is σ = 15282146880. Its totient is φ = 2014087680.

The previous prime is 6536636401. The next prime is 6536636479. The reversal of 6536636478 is 8746366356.

6536636478 is a `hidden beast` number, since 6 + 536 + 6 + 36 + 4 + 78 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6536636479) 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, 1848400 + ... + 1851932.

It is an arithmetic number, because the mean of its divisors is an integer number (159189030).

Almost surely, 2^6536636478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6536636478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7641073440).

6536636478 is an abundant number, since it is smaller than the sum of its proper divisors (8745510402).

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

6536636478 is a wasteful number, since it uses less digits than its factorization.

6536636478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3714 (or 3711 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 54.

The square root of 6536636478 is about 80849.4680130921. The cubic root of 6536636478 is about 1869.7553206321.

The spelling of 6536636478 in words is "six billion, five hundred thirty-six million, six hundred thirty-six thousand, four hundred seventy-eight".