65406480984 has 192 divisors, whose sum is σ = 202163925600. Its totient is φ = 18956851200.

The previous prime is 65406480959. The next prime is 65406481027. The reversal of 65406480984 is 48908460456.

65406480984 is a `hidden beast` number, since 6 + 540 + 6 + 4 + 8 + 0 + 98 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 65406480984.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1083519 + ... + 1142289.

Almost surely, 2^65406480984 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 65406480984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101081962800).

65406480984 is an abundant number, since it is smaller than the sum of its proper divisors (136757444616).

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

65406480984 is a wasteful number, since it uses less digits than its factorization.

65406480984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58866 (or 58859 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 65406480984 in words is "sixty-five billion, four hundred six million, four hundred eighty thousand, nine hundred eighty-four".