36806918538 has 64 divisors (see below), whose sum is σ = 82768637952. Its totient is φ = 10826861760.

The previous prime is 36806918537. The next prime is 36806918563. The reversal of 36806918538 is 83581960863.

It is a super-3 number, since 3×36806918538³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (36806918537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4098393 + ... + 4107363.

It is an arithmetic number, because the mean of its divisors is an integer number (1293259968).

Almost surely, 2^36806918538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 36806918538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41384318976).

36806918538 is an abundant number, since it is smaller than the sum of its proper divisors (45961719414).

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

36806918538 is a wasteful number, since it uses less digits than its factorization.

36806918538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11299.

The product of its (nonzero) digits is 7464960, while the sum is 57.

The spelling of 36806918538 in words is "thirty-six billion, eight hundred six million, nine hundred eighteen thousand, five hundred thirty-eight".