7638020812129 has 2 divisors, whose sum is σ = 7638020812130. Its totient is φ = 7638020812128.

The previous prime is 7638020812073. The next prime is 7638020812237. The reversal of 7638020812129 is 9212180208367.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4606410525025 + 3031610287104 = 2146255^2 + 1741152^2 .

It is a cyclic number.

It is not a de Polignac number, because 7638020812129 - 2⁷ = 7638020812001 is a prime.

It is not a weakly prime, because it can be changed into another prime (7638020812529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3819010406064 + 3819010406065.

It is an arithmetic number, because the mean of its divisors is an integer number (3819010406065).

Almost surely, 2^{7638020812129} is an apocalyptic number.

It is an amenable number.

7638020812129 is a deficient number, since it is larger than the sum of its proper divisors (1).

7638020812129 is an equidigital number, since it uses as much as digits as its factorization.

7638020812129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 7638020812129 in words is "seven trillion, six hundred thirty-eight billion, twenty million, eight hundred twelve thousand, one hundred twenty-nine".