642056132364634 has 16 divisors (see below), whose sum is σ = 1037169000400680. Its totient is φ = 296333198991360.

The previous prime is 642056132364623. The next prime is 642056132364649. The reversal of 642056132364634 is 436463231650246.

642056132364634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 158974196599009 + 483081935765625 = 12608497^2 + 21979125^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3369402 + ... + 35992570.

Almost surely, 2^{642056132364634} is an apocalyptic number.

642056132364634 is a deficient number, since it is larger than the sum of its proper divisors (395112868036046).

642056132364634 is a wasteful number, since it uses less digits than its factorization.

642056132364634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33380145.

The product of its (nonzero) digits is 44789760, while the sum is 55.

The spelling of 642056132364634 in words is "six hundred forty-two trillion, fifty-six billion, one hundred thirty-two million, three hundred sixty-four thousand, six hundred thirty-four".