634040202122642 has 16 divisors (see below), whose sum is σ = 1092388000790400. Its totient is φ = 270366030193248.

The previous prime is 634040202122597. The next prime is 634040202122681. The reversal of 634040202122642 is 246221202040436.

It is a junction number, because it is equal to n+sod(n) for n = 634040202122596 and 634040202122605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113790413963 + ... + 113790419534.

It is an arithmetic number, because the mean of its divisors is an integer number (68274250049400).

Almost surely, 2^{634040202122642} is an apocalyptic number.

634040202122642 is a deficient number, since it is larger than the sum of its proper divisors (458347798667758).

634040202122642 is a wasteful number, since it uses less digits than its factorization.

634040202122642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227580833705.

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 634040202122642 in words is "six hundred thirty-four trillion, forty billion, two hundred two million, one hundred twenty-two thousand, six hundred forty-two".