640120150326 has 16 divisors (see below), whose sum is σ = 1283929758144. Its totient is φ = 212758473864.

The previous prime is 640120150321. The next prime is 640120150343. The reversal of 640120150326 is 623051021046.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 640120150293 and 640120150302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640120150321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153725140 + ... + 153729303.

It is an arithmetic number, because the mean of its divisors is an integer number (80245609884).

Almost surely, 2^640120150326 is an apocalyptic number.

640120150326 is an abundant number, since it is smaller than the sum of its proper divisors (643809607818).

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

640120150326 is a wasteful number, since it uses less digits than its factorization.

640120150326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307454795.

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 640120150326 in words is "six hundred forty billion, one hundred twenty million, one hundred fifty thousand, three hundred twenty-six".