12905743523557 has 2 divisors, whose sum is σ = 12905743523558. Its totient is φ = 12905743523556.

The previous prime is 12905743523537. The next prime is 12905743523567. The reversal of 12905743523557 is 75532534750921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12333926256961 + 571817266596 = 3511969^2 + 756186^2 .

It is a cyclic number.

It is not a de Polignac number, because 12905743523557 - 2³¹ = 12903596039909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12905743523537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6452871761778 + 6452871761779.

It is an arithmetic number, because the mean of its divisors is an integer number (6452871761779).

Almost surely, 2^{12905743523557} is an apocalyptic number.

It is an amenable number.

12905743523557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12905743523557 is an equidigital number, since it uses as much as digits as its factorization.

12905743523557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690000, while the sum is 58.

The spelling of 12905743523557 in words is "twelve trillion, nine hundred five billion, seven hundred forty-three million, five hundred twenty-three thousand, five hundred fifty-seven".