640494576150 has 384 divisors, whose sum is σ = 1971008847360. Its totient is φ = 135323136000.

The previous prime is 640494576149. The next prime is 640494576173. The reversal of 640494576150 is 51675494046.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 640494576093 and 640494576102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 127560640 + ... + 127565660.

It is an arithmetic number, because the mean of its divisors is an integer number (5132835540).

Almost surely, 2^640494576150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640494576150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (985504423680).

640494576150 is an abundant number, since it is smaller than the sum of its proper divisors (1330514271210).

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

640494576150 is a wasteful number, since it uses less digits than its factorization.

640494576150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5392 (or 5387 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 640494576150 in words is "six hundred forty billion, four hundred ninety-four million, five hundred seventy-six thousand, one hundred fifty".