642325105399 has 4 divisors (see below), whose sum is σ = 643074610464. Its totient is φ = 641575600336.

The previous prime is 642325105381. The next prime is 642325105417. The reversal of 642325105399 is 993501523246.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (642325105381) and next prime (642325105417).

It is a cyclic number.

It is not a de Polignac number, because 642325105399 - 2⁹ = 642325104887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642325105309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374751247 + ... + 374752960.

It is an arithmetic number, because the mean of its divisors is an integer number (160768652616).

Almost surely, 2^642325105399 is an apocalyptic number.

642325105399 is a deficient number, since it is larger than the sum of its proper divisors (749505065).

642325105399 is an equidigital number, since it uses as much as digits as its factorization.

642325105399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749505064.

The product of its (nonzero) digits is 1749600, while the sum is 49.

The spelling of 642325105399 in words is "six hundred forty-two billion, three hundred twenty-five million, one hundred five thousand, three hundred ninety-nine".