64587820140 has 72 divisors (see below), whose sum is σ = 195955735248. Its totient is φ = 17219959680.

The previous prime is 64587820117. The next prime is 64587820159. The reversal of 64587820140 is 4102878546.

64587820140 is a `hidden beast` number, since 6 + 4 + 587 + 8 + 20 + 1 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 935239 + ... + 1001921.

It is an arithmetic number, because the mean of its divisors is an integer number (2721607434).

Almost surely, 2^64587820140 is an apocalyptic number.

64587820140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64587820140 is an abundant number, since it is smaller than the sum of its proper divisors (131367915108).

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

64587820140 is a wasteful number, since it uses less digits than its factorization.

64587820140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72079 (or 72074 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 64587820140 in words is "sixty-four billion, five hundred eighty-seven million, eight hundred twenty thousand, one hundred forty".