642431653134 has 16 divisors (see below), whose sum is σ = 1326310510080. Its totient is φ = 207236017080.

The previous prime is 642431653091. The next prime is 642431653139. The reversal of 642431653134 is 431356134246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642431653139) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1726966624 + ... + 1726966995.

It is an arithmetic number, because the mean of its divisors is an integer number (82894406880).

Almost surely, 2^642431653134 is an apocalyptic number.

642431653134 is an abundant number, since it is smaller than the sum of its proper divisors (683878856946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642431653134 is a wasteful number, since it uses less digits than its factorization.

642431653134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3453933655.

The product of its digits is 622080, while the sum is 42.

The spelling of 642431653134 in words is "six hundred forty-two billion, four hundred thirty-one million, six hundred fifty-three thousand, one hundred thirty-four".