640710542324 has 6 divisors (see below), whose sum is σ = 1121243449074. Its totient is φ = 320355271160.

The previous prime is 640710542281. The next prime is 640710542347. The reversal of 640710542324 is 423245017046.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 594953054224 + 45757488100 = 771332^2 + 213910^2 .

It is a super-2 number, since 2×640710542324² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80088817787 + ... + 80088817794.

It is an arithmetic number, because the mean of its divisors is an integer number (186873908179).

Almost surely, 2^640710542324 is an apocalyptic number.

It is an amenable number.

640710542324 is a deficient number, since it is larger than the sum of its proper divisors (480532906750).

640710542324 is a wasteful number, since it uses less digits than its factorization.

640710542324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160177635585 (or 160177635583 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 38.

The spelling of 640710542324 in words is "six hundred forty billion, seven hundred ten million, five hundred forty-two thousand, three hundred twenty-four".