6906810125 has 16 divisors (see below), whose sum is σ = 8623126512. Its totient is φ = 5523251200.

The previous prime is 6906810121. The next prime is 6906810181. The reversal of 6906810125 is 5210186096.

It can be written as a sum of positive squares in 8 ways, for example, as 5820316681 + 1086493444 = 76291^2 + 32962^2 .

It is not a de Polignac number, because 6906810125 - 2² = 6906810121 is a prime.

It is a super-2 number, since 2×6906810125² = 95408052205605031250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6906810121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352589 + ... + 371661.

It is an arithmetic number, because the mean of its divisors is an integer number (538945407).

Almost surely, 2^6906810125 is an apocalyptic number.

It is an amenable number.

6906810125 is a deficient number, since it is larger than the sum of its proper divisors (1716316387).

6906810125 is a wasteful number, since it uses less digits than its factorization.

6906810125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21985 (or 21975 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 6906810125 is about 83107.2206550069. The cubic root of 6906810125 is about 1904.4043829734.

The spelling of 6906810125 in words is "six billion, nine hundred six million, eight hundred ten thousand, one hundred twenty-five".