129551038871 has 2 divisors, whose sum is σ = 129551038872. Its totient is φ = 129551038870.

The previous prime is 129551038801. The next prime is 129551038879. The reversal of 129551038871 is 178830155921.

It is a strong prime.

It is an emirp because it is prime and its reverse (178830155921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129551038871 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129551038879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64775519435 + 64775519436.

It is an arithmetic number, because the mean of its divisors is an integer number (64775519436).

Almost surely, 2^129551038871 is an apocalyptic number.

129551038871 is a deficient number, since it is larger than the sum of its proper divisors (1).

129551038871 is an equidigital number, since it uses as much as digits as its factorization.

129551038871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604800, while the sum is 50.

The spelling of 129551038871 in words is "one hundred twenty-nine billion, five hundred fifty-one million, thirty-eight thousand, eight hundred seventy-one".