64151967818 has 16 divisors (see below), whose sum is σ = 96976202400. Its totient is φ = 31826636400.

The previous prime is 64151967799. The next prime is 64151967829. The reversal of 64151967818 is 81876915146.

It is a super-2 number, since 2×64151967818² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2594333 + ... + 2618943.

It is an arithmetic number, because the mean of its divisors is an integer number (6061012650).

Almost surely, 2^64151967818 is an apocalyptic number.

64151967818 is a deficient number, since it is larger than the sum of its proper divisors (32824234582).

64151967818 is a wasteful number, since it uses less digits than its factorization.

64151967818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34693.

The product of its digits is 2903040, while the sum is 56.

The spelling of 64151967818 in words is "sixty-four billion, one hundred fifty-one million, nine hundred sixty-seven thousand, eight hundred eighteen".