640451325462 has 128 divisors (see below), whose sum is σ = 1484798515200. Its totient is φ = 182487914496.

The previous prime is 640451325439. The next prime is 640451325463. The reversal of 640451325462 is 264523154046.

It is a happy number.

It is a super-3 number, since 3×640451325462³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640451325463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 59688114 + ... + 59698842.

It is an arithmetic number, because the mean of its divisors is an integer number (11599988400).

Almost surely, 2^640451325462 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640451325462, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (742399257600).

640451325462 is an abundant number, since it is smaller than the sum of its proper divisors (844347189738).

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

640451325462 is a wasteful number, since it uses less digits than its factorization.

640451325462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11670.

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 640451325462 in words is "six hundred forty billion, four hundred fifty-one million, three hundred twenty-five thousand, four hundred sixty-two".