76825656109 has 2 divisors, whose sum is σ = 76825656110. Its totient is φ = 76825656108.

The previous prime is 76825656067. The next prime is 76825656113. The reversal of 76825656109 is 90165652867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59803235209 + 17022420900 = 244547^2 + 130470^2 .

It is a cyclic number.

It is not a de Polignac number, because 76825656109 - 2¹⁵ = 76825623341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76825656109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76825656139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38412828054 + 38412828055.

It is an arithmetic number, because the mean of its divisors is an integer number (38412828055).

Almost surely, 2^76825656109 is an apocalyptic number.

It is an amenable number.

76825656109 is a deficient number, since it is larger than the sum of its proper divisors (1).

76825656109 is an equidigital number, since it uses as much as digits as its factorization.

76825656109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 76825656109 in words is "seventy-six billion, eight hundred twenty-five million, six hundred fifty-six thousand, one hundred nine".