64860252240 has 160 divisors (see below), whose sum is σ = 229959924480. Its totient is φ = 14814277632.

The previous prime is 64860252217. The next prime is 64860252251. The reversal of 64860252240 is 4225206846.

64860252240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2387212 + ... + 2414228.

It is an arithmetic number, because the mean of its divisors is an integer number (1437249528).

Almost surely, 2^64860252240 is an apocalyptic number.

64860252240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64860252240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114979962240).

64860252240 is an abundant number, since it is smaller than the sum of its proper divisors (165099672240).

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

64860252240 is a wasteful number, since it uses less digits than its factorization.

64860252240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28469 (or 28463 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 39.

The spelling of 64860252240 in words is "sixty-four billion, eight hundred sixty million, two hundred fifty-two thousand, two hundred forty".