65236438980 has 144 divisors (see below), whose sum is σ = 202246087680. Its totient is φ = 17013452544.

The previous prime is 65236438973. The next prime is 65236438987. The reversal of 65236438980 is 8983463256.

65236438980 is a `hidden beast` number, since 6 + 523 + 6 + 4 + 38 + 9 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (65236438973) and next prime (65236438987).

It is not an unprimeable number, because it can be changed into a prime (65236438987) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 17501877 + ... + 17505603.

It is an arithmetic number, because the mean of its divisors is an integer number (1404486720).

Almost surely, 2^65236438980 is an apocalyptic number.

65236438980 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 65236438980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101123043840).

65236438980 is an abundant number, since it is smaller than the sum of its proper divisors (137009648700).

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

65236438980 is a wasteful number, since it uses less digits than its factorization.

65236438980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5858 (or 5853 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 65236438980 in words is "sixty-five billion, two hundred thirty-six million, four hundred thirty-eight thousand, nine hundred eighty".