65900737728 has 896 divisors, whose sum is σ = 249126451200. Its totient is φ = 16647192576.

The previous prime is 65900737723. The next prime is 65900737733. The reversal of 65900737728 is 82773700956.

It is an interprime number because it is at equal distance from previous prime (65900737723) and next prime (65900737733).

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

It is not an unprimeable number, because it can be changed into a prime (65900737723) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 256422976 + ... + 256423232.

Almost surely, 2^65900737728 is an apocalyptic number.

65900737728 is a gapful number since it is divisible by the number (68) 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 65900737728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124563225600).

65900737728 is an abundant number, since it is smaller than the sum of its proper divisors (183225713472).

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

65900737728 is a wasteful number, since it uses less digits than its factorization.

65900737728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 54.

The spelling of 65900737728 in words is "sixty-five billion, nine hundred million, seven hundred thirty-seven thousand, seven hundred twenty-eight".