1156071256643 has 2 divisors, whose sum is σ = 1156071256644. Its totient is φ = 1156071256642.

The previous prime is 1156071256547. The next prime is 1156071256699. The reversal of 1156071256643 is 3466521706511.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1156071256643 - 2¹² = 1156071252547 is a prime.

It is a super-2 number, since 2×1156071256643² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1156071256243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578035628321 + 578035628322.

It is an arithmetic number, because the mean of its divisors is an integer number (578035628322).

Almost surely, 2^{1156071256643} is an apocalyptic number.

1156071256643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156071256643 is an equidigital number, since it uses as much as digits as its factorization.

1156071256643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 1156071256643 in words is "one trillion, one hundred fifty-six billion, seventy-one million, two hundred fifty-six thousand, six hundred forty-three".