64408289715 has 432 divisors, whose sum is σ = 153799446528. Its totient is φ = 24377760000.

The previous prime is 64408289689. The next prime is 64408289717. The reversal of 64408289715 is 51798280446.

It is a happy number.

It is not a de Polignac number, because 64408289715 - 2¹¹ = 64408287667 is a prime.

It is a super-2 number, since 2×64408289715² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64408289717) 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 431 ways as a sum of consecutive naturals, for example, 426544890 + ... + 426545040.

Almost surely, 2^64408289715 is an apocalyptic number.

64408289715 is an abundant number, since it is smaller than the sum of its proper divisors (89391156813).

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

64408289715 is a wasteful number, since it uses less digits than its factorization.

64408289715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 64408289715 in words is "sixty-four billion, four hundred eight million, two hundred eighty-nine thousand, seven hundred fifteen".