1156521941489 has 2 divisors, whose sum is σ = 1156521941490. Its totient is φ = 1156521941488.

The previous prime is 1156521941483. The next prime is 1156521941537. The reversal of 1156521941489 is 9841491256511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1085982831025 + 70539110464 = 1042105^2 + 265592^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156521941489 - 2⁸ = 1156521941233 is a prime.

It is a super-2 number, since 2×1156521941489² (a number of 25 digits) contains 22 as substring.

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 (1156521941483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578260970744 + 578260970745.

It is an arithmetic number, because the mean of its divisors is an integer number (578260970745).

Almost surely, 2^{1156521941489} is an apocalyptic number.

It is an amenable number.

1156521941489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156521941489 is an equidigital number, since it uses as much as digits as its factorization.

1156521941489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3110400, while the sum is 56.

The spelling of 1156521941489 in words is "one trillion, one hundred fifty-six billion, five hundred twenty-one million, nine hundred forty-one thousand, four hundred eighty-nine".