642026216458 has 32 divisors (see below), whose sum is σ = 1053988122240. Its totient is φ = 290886456000.

The previous prime is 642026216393. The next prime is 642026216473. The reversal of 642026216458 is 854612620246.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18788068 + ... + 18822208.

It is an arithmetic number, because the mean of its divisors is an integer number (32937128820).

Almost surely, 2^642026216458 is an apocalyptic number.

642026216458 is a deficient number, since it is larger than the sum of its proper divisors (411961905782).

642026216458 is a wasteful number, since it uses less digits than its factorization.

642026216458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36894.

The product of its (nonzero) digits is 1105920, while the sum is 46.

The spelling of 642026216458 in words is "six hundred forty-two billion, twenty-six million, two hundred sixteen thousand, four hundred fifty-eight".