1156105363789 has 4 divisors (see below), whose sum is σ = 1156527148860. Its totient is φ = 1155683578720.

The previous prime is 1156105363753. The next prime is 1156105363799. The reversal of 1156105363789 is 9873635016511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 569824187689 + 586281176100 = 754867^2 + 765690^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156105363789 - 2¹³ = 1156105355597 is a prime.

It is a super-2 number, since 2×1156105363789² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156105363799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210888424 + ... + 210893905.

It is an arithmetic number, because the mean of its divisors is an integer number (289131787215).

Almost surely, 2^{1156105363789} is an apocalyptic number.

It is an amenable number.

1156105363789 is a deficient number, since it is larger than the sum of its proper divisors (421785071).

1156105363789 is an equidigital number, since it uses as much as digits as its factorization.

1156105363789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421785070.

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 1156105363789 in words is "one trillion, one hundred fifty-six billion, one hundred five million, three hundred sixty-three thousand, seven hundred eighty-nine".