642255090662 has 8 divisors (see below), whose sum is σ = 963395125056. Its totient is φ = 321123382312.

The previous prime is 642255090643. The next prime is 642255090691. The reversal of 642255090662 is 266090552246.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1884953 + ... + 2199444.

It is an arithmetic number, because the mean of its divisors is an integer number (120424390632).

Almost surely, 2^642255090662 is an apocalyptic number.

642255090662 is a deficient number, since it is larger than the sum of its proper divisors (321140034394).

642255090662 is a wasteful number, since it uses less digits than its factorization.

642255090662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4163022.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 642255090662 in words is "six hundred forty-two billion, two hundred fifty-five million, ninety thousand, six hundred sixty-two".