64872852420 has 48 divisors (see below), whose sum is σ = 181914001920. Its totient is φ = 17273711616.

The previous prime is 64872852409. The next prime is 64872852427. The reversal of 64872852420 is 2425827846.

It is a super-2 number, since 2×64872852420² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64872852420.

It is not an unprimeable number, because it can be changed into a prime (64872852427) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 762900 + ... + 843659.

It is an arithmetic number, because the mean of its divisors is an integer number (3789875040).

Almost surely, 2^64872852420 is an apocalyptic number.

64872852420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64872852420 is an abundant number, since it is smaller than the sum of its proper divisors (117041149500).

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

64872852420 is a wasteful number, since it uses less digits than its factorization.

64872852420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607244 (or 1607242 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 48.

The spelling of 64872852420 in words is "sixty-four billion, eight hundred seventy-two million, eight hundred fifty-two thousand, four hundred twenty".