64881948240 has 160 divisors (see below), whose sum is σ = 231188774400. Its totient is φ = 16705221120.

The previous prime is 64881948191. The next prime is 64881948283. The reversal of 64881948240 is 4284918846.

It is a happy number.

64881948240 is a `hidden beast` number, since 6 + 48 + 81 + 9 + 482 + 40 = 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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 455256 + ... + 580535.

It is an arithmetic number, because the mean of its divisors is an integer number (1444929840).

Almost surely, 2^64881948240 is an apocalyptic number.

64881948240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64881948240 is an abundant number, since it is smaller than the sum of its proper divisors (166306826160).

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

64881948240 is a wasteful number, since it uses less digits than its factorization.

64881948240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035842 (or 1035830 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 54.

The spelling of 64881948240 in words is "sixty-four billion, eight hundred eighty-one million, nine hundred forty-eight thousand, two hundred forty".