36508291981 has 8 divisors (see below), whose sum is σ = 41727398720. Its totient is φ = 31290094368.

The previous prime is 36508291957. The next prime is 36508291987. The reversal of 36508291981 is 18919280563.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 36508291981 - 2³⁵ = 2148553613 is a prime.

It is a super-2 number, since 2×36508291981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36508291987) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 138936 + ... + 303841.

It is an arithmetic number, because the mean of its divisors is an integer number (5215924840).

Almost surely, 2^36508291981 is an apocalyptic number.

It is an amenable number.

36508291981 is a deficient number, since it is larger than the sum of its proper divisors (5219106739).

36508291981 is a wasteful number, since it uses less digits than its factorization.

36508291981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454563.

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 36508291981 in words is "thirty-six billion, five hundred eight million, two hundred ninety-one thousand, nine hundred eighty-one".