64408507960 has 64 divisors (see below), whose sum is σ = 148089876480. Its totient is φ = 25205750400.

The previous prime is 64408507931. The next prime is 64408507963. The reversal of 64408507960 is 6970580446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64408507963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247785 + ... + 436135.

It is an arithmetic number, because the mean of its divisors is an integer number (2313904320).

Almost surely, 2^64408507960 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64408507960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74044938240).

64408507960 is an abundant number, since it is smaller than the sum of its proper divisors (83681368520).

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

64408507960 is a wasteful number, since it uses less digits than its factorization.

64408507960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188548 (or 188544 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 64408507960 in words is "sixty-four billion, four hundred eight million, five hundred seven thousand, nine hundred sixty".