65332979136 has 448 divisors, whose sum is σ = 205481041920. Its totient is φ = 20321280000.

The previous prime is 65332979059. The next prime is 65332979137. The reversal of 65332979136 is 63197923356.

65332979136 is a `hidden beast` number, since 6 + 533 + 2 + 9 + 79 + 1 + 36 = 666.

It is a super-2 number, since 2×65332979136² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65332979137) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 331639390 + ... + 331639586.

It is an arithmetic number, because the mean of its divisors is an integer number (458663040).

Almost surely, 2^65332979136 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 65332979136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102740520960).

65332979136 is an abundant number, since it is smaller than the sum of its proper divisors (140148062784).

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

65332979136 is a wasteful number, since it uses less digits than its factorization.

65332979136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 425 counting only the distinct ones).

The product of its digits is 5511240, while the sum is 54.

The spelling of 65332979136 in words is "sixty-five billion, three hundred thirty-two million, nine hundred seventy-nine thousand, one hundred thirty-six".