65123896320 has 440 divisors, whose sum is σ = 266717287584. Its totient is φ = 14884798464.

The previous prime is 65123896309. The next prime is 65123896373. The reversal of 65123896320 is 2369832156.

65123896320 is a `hidden beast` number, since 6 + 5 + 1 + 2 + 3 + 8 + 9 + 632 + 0 = 666.

It is a super-2 number, since 2×65123896320² (a number of 22 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2891824 + ... + 2914256.

Almost surely, 2^65123896320 is an apocalyptic number.

65123896320 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 65123896320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133358643792).

65123896320 is an abundant number, since it is smaller than the sum of its proper divisors (201593391264).

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

65123896320 is a wasteful number, since it uses less digits than its factorization.

65123896320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22477 (or 22450 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 65123896320 in words is "sixty-five billion, one hundred twenty-three million, eight hundred ninety-six thousand, three hundred twenty".