642520043233424 has 10 divisors (see below), whose sum is σ = 1244882583764790. Its totient is φ = 321260021616704.

The previous prime is 642520043233297. The next prime is 642520043233441. The reversal of 642520043233424 is 424332340025246.

It can be written as a sum of positive squares in only one way, i.e., 437394057505024 + 205125985728400 = 20913968^2 + 14322220^2 .

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, 20078751351029 + ... + 20078751351060.

It is an arithmetic number, because the mean of its divisors is an integer number (124488258376479).

Almost surely, 2^{642520043233424} is an apocalyptic number.

It is an amenable number.

642520043233424 is a deficient number, since it is larger than the sum of its proper divisors (602362540531366).

642520043233424 is a wasteful number, since it uses less digits than its factorization.

642520043233424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40157502702097 (or 40157502702091 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 44.

The spelling of 642520043233424 in words is "six hundred forty-two trillion, five hundred twenty billion, forty-three million, two hundred thirty-three thousand, four hundred twenty-four".