640115464350 has 96 divisors (see below), whose sum is σ = 1615938180480. Its totient is φ = 167643664000.

The previous prime is 640115464337. The next prime is 640115464397. The reversal of 640115464350 is 53464511046.

640115464350 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×640115464350² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 640115464299 and 640115464308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9355765 + ... + 9423935.

It is an arithmetic number, because the mean of its divisors is an integer number (16832689380).

Almost surely, 2^640115464350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640115464350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (807969090240).

640115464350 is an abundant number, since it is smaller than the sum of its proper divisors (975822716130).

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

640115464350 is a wasteful number, since it uses less digits than its factorization.

640115464350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69306 (or 69301 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 640115464350 its reverse (53464511046), we get a palindrome (693579975396).

The spelling of 640115464350 in words is "six hundred forty billion, one hundred fifteen million, four hundred sixty-four thousand, three hundred fifty".