7129874538881 has 2 divisors, whose sum is σ = 7129874538882. Its totient is φ = 7129874538880.

The previous prime is 7129874538847. The next prime is 7129874538883. The reversal of 7129874538881 is 1888354789217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6832368654400 + 297505884481 = 2613880^2 + 545441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7129874538881 is a prime.

It is a super-2 number, since 2×7129874538881² (a number of 27 digits) contains 22 as substring.

Together with 7129874538883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7129874538883) 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 as a sum of consecutive naturals, namely, 3564937269440 + 3564937269441.

It is an arithmetic number, because the mean of its divisors is an integer number (3564937269441).

Almost surely, 2^{7129874538881} is an apocalyptic number.

It is an amenable number.

7129874538881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7129874538881 is an equidigital number, since it uses as much as digits as its factorization.

7129874538881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216760320, while the sum is 71.

The spelling of 7129874538881 in words is "seven trillion, one hundred twenty-nine billion, eight hundred seventy-four million, five hundred thirty-eight thousand, eight hundred eighty-one".