1156352889661 has 2 divisors, whose sum is σ = 1156352889662. Its totient is φ = 1156352889660.

The previous prime is 1156352889541. The next prime is 1156352889673. The reversal of 1156352889661 is 1669882536511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 887023028761 + 269329860900 = 941819^2 + 518970^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156352889661 - 2¹³ = 1156352881469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1156352889661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1156352889691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578176444830 + 578176444831.

It is an arithmetic number, because the mean of its divisors is an integer number (578176444831).

Almost surely, 2^{1156352889661} is an apocalyptic number.

It is an amenable number.

1156352889661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156352889661 is an equidigital number, since it uses as much as digits as its factorization.

1156352889661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18662400, while the sum is 61.

The spelling of 1156352889661 in words is "one trillion, one hundred fifty-six billion, three hundred fifty-two million, eight hundred eighty-nine thousand, six hundred sixty-one".