640162492288 has 256 divisors, whose sum is σ = 1503419616000. Its totient is φ = 268435537920.

The previous prime is 640162492283. The next prime is 640162492337. The reversal of 640162492288 is 882294261046.

It is a happy number.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640162492283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159520170 + ... + 159524182.

It is an arithmetic number, because the mean of its divisors is an integer number (5872732875).

Almost surely, 2^640162492288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640162492288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (751709808000).

640162492288 is an abundant number, since it is smaller than the sum of its proper divisors (863257123712).

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

640162492288 is a wasteful number, since it uses less digits than its factorization.

640162492288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4213 (or 4201 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 52.

The spelling of 640162492288 in words is "six hundred forty billion, one hundred sixty-two million, four hundred ninety-two thousand, two hundred eighty-eight".