65399088384 has 216 divisors, whose sum is σ = 216291828480. Its totient is φ = 18616725504.

The previous prime is 65399088347. The next prime is 65399088407. The reversal of 65399088384 is 48388099356.

65399088384 is a `hidden beast` number, since 6 + 539 + 90 + 8 + 8 + 3 + 8 + 4 = 666.

It is a super-2 number, since 2×65399088384² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

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, 4460137 + ... + 4474775.

Almost surely, 2^65399088384 is an apocalyptic number.

65399088384 is a gapful number since it is divisible by the number (64) 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 65399088384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108145914240).

65399088384 is an abundant number, since it is smaller than the sum of its proper divisors (150892740096).

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

65399088384 is a wasteful number, since it uses less digits than its factorization.

65399088384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14945 (or 14928 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 65399088384 in words is "sixty-five billion, three hundred ninety-nine million, eighty-eight thousand, three hundred eighty-four".