76625621909 has 2 divisors, whose sum is σ = 76625621910. Its totient is φ = 76625621908.

The previous prime is 76625621893. The next prime is 76625621929. The reversal of 76625621909 is 90912652667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66691513009 + 9934108900 = 258247^2 + 99670^2 .

It is a cyclic number.

It is not a de Polignac number, because 76625621909 - 2⁴ = 76625621893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76625621929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38312810954 + 38312810955.

It is an arithmetic number, because the mean of its divisors is an integer number (38312810955).

Almost surely, 2^76625621909 is an apocalyptic number.

It is an amenable number.

76625621909 is a deficient number, since it is larger than the sum of its proper divisors (1).

76625621909 is an equidigital number, since it uses as much as digits as its factorization.

76625621909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 76625621909 in words is "seventy-six billion, six hundred twenty-five million, six hundred twenty-one thousand, nine hundred nine".