642065644234 has 16 divisors (see below), whose sum is σ = 1100712412800. Its totient is φ = 275163877584.

The previous prime is 642065644211. The next prime is 642065644249. The reversal of 642065644234 is 432446560246.

642065644234 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 12169 + ... + 1133260.

It is an arithmetic number, because the mean of its divisors is an integer number (68794525800).

Almost surely, 2^642065644234 is an apocalyptic number.

642065644234 is a deficient number, since it is larger than the sum of its proper divisors (458646768566).

642065644234 is a wasteful number, since it uses less digits than its factorization.

642065644234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185477.

The product of its (nonzero) digits is 3317760, while the sum is 46.

The spelling of 642065644234 in words is "six hundred forty-two billion, sixty-five million, six hundred forty-four thousand, two hundred thirty-four".