65420498880 has 1008 divisors, whose sum is σ = 272247786720. Its totient is φ = 14890106880.

The previous prime is 65420498849. The next prime is 65420498903. The reversal of 65420498880 is 8889402456.

65420498880 is a `hidden beast` number, since 6 + 54 + 20 + 498 + 8 + 80 = 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 143 ways as a sum of consecutive naturals, for example, 159952116 + ... + 159952524.

It is an arithmetic number, because the mean of its divisors is an integer number (270087090).

Almost surely, 2^65420498880 is an apocalyptic number.

65420498880 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 65420498880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136123893360).

65420498880 is an abundant number, since it is smaller than the sum of its proper divisors (206827287840).

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

65420498880 is a wasteful number, since it uses less digits than its factorization.

65420498880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 65420498880 in words is "sixty-five billion, four hundred twenty million, four hundred ninety-eight thousand, eight hundred eighty".