64207464440 has 64 divisors (see below), whose sum is σ = 165127334400. Its totient is φ = 22010997888.

The previous prime is 64207464437. The next prime is 64207464443. The reversal of 64207464440 is 4446470246.

It is an interprime number because it is at equal distance from previous prime (64207464437) and next prime (64207464443).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64207464443) 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 15 ways as a sum of consecutive naturals, for example, 3333317 + ... + 3352523.

It is an arithmetic number, because the mean of its divisors is an integer number (2580114600).

Almost surely, 2^64207464440 is an apocalyptic number.

It is an amenable number.

64207464440 is an abundant number, since it is smaller than the sum of its proper divisors (100919869960).

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

64207464440 is a wasteful number, since it uses less digits than its factorization.

64207464440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31164 (or 31160 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 41.

The spelling of 64207464440 in words is "sixty-four billion, two hundred seven million, four hundred sixty-four thousand, four hundred forty".