65481514992 has 160 divisors (see below), whose sum is σ = 190372815360. Its totient is φ = 21547883520.

The previous prime is 65481514963. The next prime is 65481515009. The reversal of 65481514992 is 29941518456.

65481514992 is a `hidden beast` number, since 6 + 548 + 1 + 5 + 1 + 4 + 9 + 92 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15437992 + ... + 15442232.

It is an arithmetic number, because the mean of its divisors is an integer number (1189830096).

Almost surely, 2^65481514992 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 65481514992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95186407680).

65481514992 is an abundant number, since it is smaller than the sum of its proper divisors (124891300368).

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

65481514992 is a wasteful number, since it uses less digits than its factorization.

65481514992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4708 (or 4696 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The spelling of 65481514992 in words is "sixty-five billion, four hundred eighty-one million, five hundred fourteen thousand, nine hundred ninety-two".