640848153600 has 924 divisors, whose sum is σ = 2486918411856. Its totient is φ = 163353231360.

The previous prime is 640848153527. The next prime is 640848153607. The reversal of 640848153600 is 6351848046.

640848153600 is a `hidden beast` number, since 64 + 0 + 8 + 481 + 53 + 60 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (640848153607) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 429234454 + ... + 429235946.

Almost surely, 2^640848153600 is an apocalyptic number.

640848153600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640848153600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1243459205928).

640848153600 is an abundant number, since it is smaller than the sum of its proper divisors (1846070258256).

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

640848153600 is a wasteful number, since it uses less digits than its factorization.

640848153600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564 (or 1526 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 640848153600 in words is "six hundred forty billion, eight hundred forty-eight million, one hundred fifty-three thousand, six hundred".