64020504240 has 240 divisors, whose sum is σ = 268054914816. Its totient is φ = 13302950400.

The previous prime is 64020504089. The next prime is 64020504241. The reversal of 64020504240 is 4240502046.

It is a tau number, because it is divible by the number of its divisors (240).

It is not an unprimeable number, because it can be changed into a prime (64020504241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 521946 + ... + 632825.

Almost surely, 2^64020504240 is an apocalyptic number.

64020504240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64020504240 is an abundant number, since it is smaller than the sum of its proper divisors (204034410576).

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

64020504240 is a wasteful number, since it uses less digits than its factorization.

64020504240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154808 (or 1154799 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The spelling of 64020504240 in words is "sixty-four billion, twenty million, five hundred four thousand, two hundred forty".