115315400549 has 2 divisors, whose sum is σ = 115315400550. Its totient is φ = 115315400548.

The previous prime is 115315400491. The next prime is 115315400573. The reversal of 115315400549 is 945004513511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107521689025 + 7793711524 = 327905^2 + 88282^2 .

It is a cyclic number.

It is not a de Polignac number, because 115315400549 - 2¹⁶ = 115315335013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115315400579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57657700274 + 57657700275.

It is an arithmetic number, because the mean of its divisors is an integer number (57657700275).

Almost surely, 2^115315400549 is an apocalyptic number.

It is an amenable number.

115315400549 is a deficient number, since it is larger than the sum of its proper divisors (1).

115315400549 is an equidigital number, since it uses as much as digits as its factorization.

115315400549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 115315400549 in words is "one hundred fifteen billion, three hundred fifteen million, four hundred thousand, five hundred forty-nine".