640911470707200 has 4320 divisors, whose sum is σ = 2928157685342208. Its totient is φ = 122053091328000.

The previous prime is 640911470707133. The next prime is 640911470707229. The reversal of 640911470707200 is 2707074119046.

It is a happy number.

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 640911470707200.

It is an unprimeable number.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 231626840217 + ... + 231626842983.

Almost surely, 2^{640911470707200} is an apocalyptic number.

640911470707200 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 640911470707200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1464078842671104).

640911470707200 is an abundant number, since it is smaller than the sum of its proper divisors (2287246214635008).

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

640911470707200 is a wasteful number, since it uses less digits than its factorization.

640911470707200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2892 (or 2845 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 48.

The spelling of 640911470707200 in words is "six hundred forty trillion, nine hundred eleven billion, four hundred seventy million, seven hundred seven thousand, two hundred".