642092128592 has 20 divisors (see below), whose sum is σ = 1246239902580. Its totient is φ = 320481831168.

The previous prime is 642092128537. The next prime is 642092128649. The reversal of 642092128592 is 295821290246.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 309273903376 + 332818225216 = 556124^2 + 576904^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 642092128592.

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, 35255183 + ... + 35273390.

It is an arithmetic number, because the mean of its divisors is an integer number (62311995129).

Almost surely, 2^642092128592 is an apocalyptic number.

It is an amenable number.

642092128592 is a deficient number, since it is larger than the sum of its proper divisors (604147773988).

642092128592 is a wasteful number, since it uses less digits than its factorization.

642092128592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70529150 (or 70529144 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 642092128592 in words is "six hundred forty-two billion, ninety-two million, one hundred twenty-eight thousand, five hundred ninety-two".