664143486240 has 96 divisors (see below), whose sum is σ = 2252979078336. Its totient is φ = 163481472000.

The previous prime is 664143486229. The next prime is 664143486287. The reversal of 664143486240 is 42684341466.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 664143486240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53210386 + ... + 53222865.

It is an arithmetic number, because the mean of its divisors is an integer number (23468532066).

Almost surely, 2^664143486240 is an apocalyptic number.

664143486240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664143486240 is an abundant number, since it is smaller than the sum of its proper divisors (1588835592096).

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

664143486240 is a wasteful number, since it uses less digits than its factorization.

664143486240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106433282 (or 106433274 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 48.

The spelling of 664143486240 in words is "six hundred sixty-four billion, one hundred forty-three million, four hundred eighty-six thousand, two hundred forty".