2506323645138 has 32 divisors (see below), whose sum is σ = 5097995910720. Its totient is φ = 821218603520.

The previous prime is 2506323645121. The next prime is 2506323645139. The reversal of 2506323645138 is 8315463236052.

It is not an unprimeable number, because it can be changed into a prime (2506323645139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4500718 + ... + 5026838.

It is an arithmetic number, because the mean of its divisors is an integer number (159312372210).

Almost surely, 2^{2506323645138} is an apocalyptic number.

2506323645138 is an abundant number, since it is smaller than the sum of its proper divisors (2591672265582).

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

2506323645138 is a wasteful number, since it uses less digits than its factorization.

2506323645138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539642.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 2506323645138 in words is "two trillion, five hundred six billion, three hundred twenty-three million, six hundred forty-five thousand, one hundred thirty-eight".