1545605659901 has 2 divisors, whose sum is σ = 1545605659902. Its totient is φ = 1545605659900.

The previous prime is 1545605659867. The next prime is 1545605659903. The reversal of 1545605659901 is 1099565065451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1489791124900 + 55814535001 = 1220570^2 + 236251^2 .

It is a cyclic number.

It is not a de Polignac number, because 1545605659901 - 2⁶ = 1545605659837 is a prime.

Together with 1545605659903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1545605659903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772802829950 + 772802829951.

It is an arithmetic number, because the mean of its divisors is an integer number (772802829951).

Almost surely, 2^{1545605659901} is an apocalyptic number.

It is an amenable number.

1545605659901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1545605659901 is an equidigital number, since it uses as much as digits as its factorization.

1545605659901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290000, while the sum is 56.

The spelling of 1545605659901 in words is "one trillion, five hundred forty-five billion, six hundred five million, six hundred fifty-nine thousand, nine hundred one".