636117765340 has 12 divisors (see below), whose sum is σ = 1335847307256. Its totient is φ = 254447106128.

The previous prime is 636117765337. The next prime is 636117765341. The reversal of 636117765340 is 43567711636.

It is a super-2 number, since 2×636117765340² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636117765341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15902944114 + ... + 15902944153.

It is an arithmetic number, because the mean of its divisors is an integer number (111320608938).

Almost surely, 2^636117765340 is an apocalyptic number.

It is an amenable number.

636117765340 is an abundant number, since it is smaller than the sum of its proper divisors (699729541916).

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

636117765340 is a wasteful number, since it uses less digits than its factorization.

636117765340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31805888276 (or 31805888274 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 49.

The spelling of 636117765340 in words is "six hundred thirty-six billion, one hundred seventeen million, seven hundred sixty-five thousand, three hundred forty".