129551038801 has 2 divisors, whose sum is σ = 129551038802. Its totient is φ = 129551038800.

The previous prime is 129551038783. The next prime is 129551038871. The reversal of 129551038801 is 108830155921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95988432400 + 33562606401 = 309820^2 + 183201^2 .

It is a cyclic number.

It is not a de Polignac number, because 129551038801 - 2⁵ = 129551038769 is a prime.

It is not a weakly prime, because it can be changed into another prime (129551038871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64775519400 + 64775519401.

It is an arithmetic number, because the mean of its divisors is an integer number (64775519401).

Almost surely, 2^129551038801 is an apocalyptic number.

It is an amenable number.

129551038801 is a deficient number, since it is larger than the sum of its proper divisors (1).

129551038801 is an equidigital number, since it uses as much as digits as its factorization.

129551038801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 43.

The spelling of 129551038801 in words is "one hundred twenty-nine billion, five hundred fifty-one million, thirty-eight thousand, eight hundred one".