642515365326 has 16 divisors (see below), whose sum is σ = 1285590196944. Its totient is φ = 214078544064.

The previous prime is 642515365321. The next prime is 642515365343. The reversal of 642515365326 is 623563515246.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642515365321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23296165 + ... + 23323728.

It is an arithmetic number, because the mean of its divisors is an integer number (80349387309).

Almost surely, 2^642515365326 is an apocalyptic number.

642515365326 is an abundant number, since it is smaller than the sum of its proper divisors (643074831618).

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

642515365326 is a wasteful number, since it uses less digits than its factorization.

642515365326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46622195.

The product of its digits is 3888000, while the sum is 48.

The spelling of 642515365326 in words is "six hundred forty-two billion, five hundred fifteen million, three hundred sixty-five thousand, three hundred twenty-six".