138263818825 has 12 divisors (see below), whose sum is σ = 187033238928. Its totient is φ = 100555504400.

The previous prime is 138263818817. The next prime is 138263818831. The reversal of 138263818825 is 528818362831.

It is not a de Polignac number, because 138263818825 - 2³ = 138263818817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 251388487 + ... + 251389036.

It is an arithmetic number, because the mean of its divisors is an integer number (15586103244).

Almost surely, 2^138263818825 is an apocalyptic number.

It is an amenable number.

138263818825 is a deficient number, since it is larger than the sum of its proper divisors (48769420103).

138263818825 is a wasteful number, since it uses less digits than its factorization.

138263818825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502777544 (or 502777539 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 55.

The spelling of 138263818825 in words is "one hundred thirty-eight billion, two hundred sixty-three million, eight hundred eighteen thousand, eight hundred twenty-five".