36519689778 has 96 divisors (see below), whose sum is σ = 86834861568. Its totient is φ = 10170842880.

The previous prime is 36519689743. The next prime is 36519689783. The reversal of 36519689778 is 87798691563.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2190751 + ... + 2207357.

It is an arithmetic number, because the mean of its divisors is an integer number (904529808).

Almost surely, 2^36519689778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 36519689778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43417430784).

36519689778 is an abundant number, since it is smaller than the sum of its proper divisors (50315171790).

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

36519689778 is a wasteful number, since it uses less digits than its factorization.

36519689778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16880 (or 16869 counting only the distinct ones).

The product of its digits is 137168640, while the sum is 69.

The spelling of 36519689778 in words is "thirty-six billion, five hundred nineteen million, six hundred eighty-nine thousand, seven hundred seventy-eight".