64197460388 has 6 divisors (see below), whose sum is σ = 112345555686. Its totient is φ = 32098730192.

The previous prime is 64197460343. The next prime is 64197460423. The reversal of 64197460388 is 88306479146.

It can be written as a sum of positive squares in only one way, i.e., 33196111204 + 31001349184 = 182198^2 + 176072^2 .

It is a super-2 number, since 2×64197460388² (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 as a sum of consecutive naturals, namely, 8024682545 + ... + 8024682552.

It is an arithmetic number, because the mean of its divisors is an integer number (18724259281).

Almost surely, 2^64197460388 is an apocalyptic number.

It is an amenable number.

64197460388 is a deficient number, since it is larger than the sum of its proper divisors (48148095298).

64197460388 is a wasteful number, since it uses less digits than its factorization.

64197460388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16049365101 (or 16049365099 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 56.

The spelling of 64197460388 in words is "sixty-four billion, one hundred ninety-seven million, four hundred sixty thousand, three hundred eighty-eight".