1156071255641 has 2 divisors, whose sum is σ = 1156071255642. Its totient is φ = 1156071255640.

The previous prime is 1156071255601. The next prime is 1156071255643. The reversal of 1156071255641 is 1465521706511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 844935993616 + 311135262025 = 919204^2 + 557795^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156071255641 - 2²⁶ = 1156004146777 is a prime.

Together with 1156071255643, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1156071255592 and 1156071255601.

It is not a weakly prime, because it can be changed into another prime (1156071255643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578035627820 + 578035627821.

It is an arithmetic number, because the mean of its divisors is an integer number (578035627821).

Almost surely, 2^{1156071255641} is an apocalyptic number.

It is an amenable number.

1156071255641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156071255641 is an equidigital number, since it uses as much as digits as its factorization.

1156071255641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252000, while the sum is 44.

The spelling of 1156071255641 in words is "one trillion, one hundred fifty-six billion, seventy-one million, two hundred fifty-five thousand, six hundred forty-one".