642312605026 has 8 divisors (see below), whose sum is σ = 963472657104. Its totient is φ = 321155052660.

The previous prime is 642312604991. The next prime is 642312605029. The reversal of 642312605026 is 620506213246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (642312605029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278901 + ... + 1167223.

It is an arithmetic number, because the mean of its divisors is an integer number (120434082138).

Almost surely, 2^642312605026 is an apocalyptic number.

642312605026 is a deficient number, since it is larger than the sum of its proper divisors (321160052078).

642312605026 is a wasteful number, since it uses less digits than its factorization.

642312605026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249856.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 642312605026 in words is "six hundred forty-two billion, three hundred twelve million, six hundred five thousand, twenty-six".