65250339840 has 264 divisors, whose sum is σ = 258390681120. Its totient is φ = 14914289664.

The previous prime is 65250339829. The next prime is 65250339853. The reversal of 65250339840 is 4893305256.

65250339840 is a `hidden beast` number, since 6 + 5 + 250 + 3 + 398 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221416 + ... + 423704.

It is an arithmetic number, because the mean of its divisors is an integer number (978752580).

Almost surely, 2^65250339840 is an apocalyptic number.

65250339840 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 65250339840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129195340560).

65250339840 is an abundant number, since it is smaller than the sum of its proper divisors (193140341280).

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

65250339840 is a wasteful number, since it uses less digits than its factorization.

65250339840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202327 (or 202306 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 65250339840 in words is "sixty-five billion, two hundred fifty million, three hundred thirty-nine thousand, eight hundred forty".