640254156150 has 144 divisors (see below), whose sum is σ = 1858836022416. Its totient is φ = 145411418880.

The previous prime is 640254156067. The next prime is 640254156151. The reversal of 640254156150 is 51651452046.

640254156150 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 640254156099 and 640254156108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640254156151) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 876532 + ... + 1431368.

It is an arithmetic number, because the mean of its divisors is an integer number (12908583489).

Almost surely, 2^640254156150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640254156150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (929418011208).

640254156150 is an abundant number, since it is smaller than the sum of its proper divisors (1218581866266).

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

640254156150 is a wasteful number, since it uses less digits than its factorization.

640254156150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555023 (or 555011 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 640254156150 in words is "six hundred forty billion, two hundred fifty-four million, one hundred fifty-six thousand, one hundred fifty".