65573540928 has 280 divisors, whose sum is σ = 222497440704. Its totient is φ = 18705945600.

The previous prime is 65573540869. The next prime is 65573540953. The reversal of 65573540928 is 82904537556.

65573540928 is a `hidden beast` number, since 6 + 5 + 5 + 7 + 3 + 540 + 92 + 8 = 666.

It is a super-2 number, since 2×65573540928² (a number of 22 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 35234718 + ... + 35236578.

Almost surely, 2^65573540928 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 65573540928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111248720352).

65573540928 is an abundant number, since it is smaller than the sum of its proper divisors (156923899776).

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

65573540928 is a wasteful number, since it uses less digits than its factorization.

65573540928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863 (or 2844 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 65573540928 in words is "sixty-five billion, five hundred seventy-three million, five hundred forty thousand, nine hundred twenty-eight".