640254414312 has 64 divisors (see below), whose sum is σ = 1778560617600. Its totient is φ = 213409002240.

The previous prime is 640254414311. The next prime is 640254414329. The reversal of 640254414312 is 213414452046.

640254414312 is a `hidden beast` number, since 64 + 0 + 2 + 544 + 1 + 43 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (640254414311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6620128 + ... + 6716144.

It is an arithmetic number, because the mean of its divisors is an integer number (27790009650).

Almost surely, 2^640254414312 is an apocalyptic number.

It is an amenable number.

640254414312 is an abundant number, since it is smaller than the sum of its proper divisors (1138306203288).

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

640254414312 is a wasteful number, since it uses less digits than its factorization.

640254414312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126903 (or 126893 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

Adding to 640254414312 its reverse (213414452046), we get a palindrome (853668866358).

The spelling of 640254414312 in words is "six hundred forty billion, two hundred fifty-four million, four hundred fourteen thousand, three hundred twelve".