64117836187 has 2 divisors, whose sum is σ = 64117836188. Its totient is φ = 64117836186.

The previous prime is 64117836169. The next prime is 64117836239. The reversal of 64117836187 is 78163871146.

It is a happy number.

It is an a-pointer prime, because the next prime (64117836239) can be obtained adding 64117836187 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64117836187 - 2⁷ = 64117836059 is a prime.

It is a super-2 number, since 2×64117836187² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64117836137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32058918093 + 32058918094.

It is an arithmetic number, because the mean of its divisors is an integer number (32058918094).

Almost surely, 2^64117836187 is an apocalyptic number.

64117836187 is a deficient number, since it is larger than the sum of its proper divisors (1).

64117836187 is an equidigital number, since it uses as much as digits as its factorization.

64117836187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 52.

The spelling of 64117836187 in words is "sixty-four billion, one hundred seventeen million, eight hundred thirty-six thousand, one hundred eighty-seven".