642255003402 has 32 divisors (see below), whose sum is σ = 1291425949440. Its totient is φ = 212935011840.

The previous prime is 642255003277. The next prime is 642255003419. The reversal of 642255003402 is 204300552246.

It is a happy number.

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, 631174 + ... + 1297262.

It is an arithmetic number, because the mean of its divisors is an integer number (40357060920).

Almost surely, 2^642255003402 is an apocalyptic number.

642255003402 is an abundant number, since it is smaller than the sum of its proper divisors (649170946038).

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

642255003402 is a wasteful number, since it uses less digits than its factorization.

642255003402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666958.

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 642255003402 its reverse (204300552246), we get a palindrome (846555555648).

The spelling of 642255003402 in words is "six hundred forty-two billion, two hundred fifty-five million, three thousand, four hundred two".