54617987129 has 2 divisors, whose sum is σ = 54617987130. Its totient is φ = 54617987128.

The previous prime is 54617987113. The next prime is 54617987183. The reversal of 54617987129 is 92178971645.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44969443600 + 9648543529 = 212060^2 + 98227^2 .

It is a cyclic number.

It is not a de Polignac number, because 54617987129 - 2⁴ = 54617987113 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (54617987429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27308993564 + 27308993565.

It is an arithmetic number, because the mean of its divisors is an integer number (27308993565).

Almost surely, 2^54617987129 is an apocalyptic number.

It is an amenable number.

54617987129 is a deficient number, since it is larger than the sum of its proper divisors (1).

54617987129 is an equidigital number, since it uses as much as digits as its factorization.

54617987129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 59.

The spelling of 54617987129 in words is "fifty-four billion, six hundred seventeen million, nine hundred eighty-seven thousand, one hundred twenty-nine".