65727232920 has 192 divisors, whose sum is σ = 228672138240. Its totient is φ = 16961788800.

The previous prime is 65727232919. The next prime is 65727232999. The reversal of 65727232920 is 2923272756.

65727232920 is a `hidden beast` number, since 6 + 57 + 272 + 329 + 2 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 192255 + ... + 410385.

It is an arithmetic number, because the mean of its divisors is an integer number (1191000720).

Almost surely, 2^65727232920 is an apocalyptic number.

65727232920 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 65727232920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114336069120).

65727232920 is an abundant number, since it is smaller than the sum of its proper divisors (162944905320).

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

65727232920 is a wasteful number, since it uses less digits than its factorization.

65727232920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218188 (or 218172 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 65727232920 in words is "sixty-five billion, seven hundred twenty-seven million, two hundred thirty-two thousand, nine hundred twenty".