6818739925 has 6 divisors (see below), whose sum is σ = 8455237538. Its totient is φ = 5454991920.

The previous prime is 6818739913. The next prime is 6818739959. The reversal of 6818739925 is 5299378186.

It can be written as a sum of positive squares in 3 ways, for example, as 4072324 + 6814667601 = 2018^2 + 82551^2 .

It is not a de Polignac number, because 6818739925 - 2¹⁹ = 6818215637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6818739925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136374774 + ... + 136374823.

Almost surely, 2^6818739925 is an apocalyptic number.

It is an amenable number.

6818739925 is a deficient number, since it is larger than the sum of its proper divisors (1636497613).

6818739925 is a wasteful number, since it uses less digits than its factorization.

6818739925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272749607 (or 272749602 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 58.

The square root of 6818739925 is about 82575.6618199334. The cubic root of 6818739925 is about 1896.2752443203.

The spelling of 6818739925 in words is "six billion, eight hundred eighteen million, seven hundred thirty-nine thousand, nine hundred twenty-five".