8138809415 has 16 divisors (see below), whose sum is σ = 11281174560. Its totient is φ = 5570949120.

The previous prime is 8138809361. The next prime is 8138809423. The reversal of 8138809415 is 5149088318.

It is not a de Polignac number, because 8138809415 - 2¹² = 8138805319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8138809415.

It is a congruent 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, 4351370 + ... + 4353239.

It is an arithmetic number, because the mean of its divisors is an integer number (705073410).

Almost surely, 2^8138809415 is an apocalyptic number.

8138809415 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

8138809415 is a deficient number, since it is larger than the sum of its proper divisors (3142365145).

8138809415 is a wasteful number, since it uses less digits than its factorization.

8138809415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8704642.

The product of its (nonzero) digits is 276480, while the sum is 47.

The square root of 8138809415 is about 90215.3502182417. The cubic root of 8138809415 is about 2011.5011858334.

The spelling of 8138809415 in words is "eight billion, one hundred thirty-eight million, eight hundred nine thousand, four hundred fifteen".