64072181601 has 8 divisors (see below), whose sum is σ = 94921750560. Its totient is φ = 42714787716.

The previous prime is 64072181597. The next prime is 64072181651. The reversal of 64072181601 is 10618127046.

It is a happy number.

64072181601 is a `hidden beast` number, since 6 + 40 + 7 + 2 + 1 + 8 + 1 + 601 = 666.

It is not a de Polignac number, because 64072181601 - 2² = 64072181597 is a prime.

It is a super-2 number, since 2×64072181601² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64072181651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1186521855 + ... + 1186521908.

It is an arithmetic number, because the mean of its divisors is an integer number (11865218820).

Almost surely, 2^64072181601 is an apocalyptic number.

It is an amenable number.

64072181601 is a deficient number, since it is larger than the sum of its proper divisors (30849568959).

64072181601 is a wasteful number, since it uses less digits than its factorization.

64072181601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373043772 (or 2373043766 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 64072181601 in words is "sixty-four billion, seventy-two million, one hundred eighty-one thousand, six hundred one".