1156105718101 has 4 divisors (see below), whose sum is σ = 1159205197612. Its totient is φ = 1153006238592.

The previous prime is 1156105718083. The next prime is 1156105718107. The reversal of 1156105718101 is 1018175016511.

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 896810894001 + 259294824100 = 947001^2 + 509210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156105718101 - 2¹³ = 1156105709909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156105718107) 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, 1549739196 + ... + 1549739941.

It is an arithmetic number, because the mean of its divisors is an integer number (289801299403).

Almost surely, 2^{1156105718101} is an apocalyptic number.

It is an amenable number.

1156105718101 is a deficient number, since it is larger than the sum of its proper divisors (3099479511).

1156105718101 is an equidigital number, since it uses as much as digits as its factorization.

1156105718101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099479510.

The product of its (nonzero) digits is 8400, while the sum is 37.

The spelling of 1156105718101 in words is "one trillion, one hundred fifty-six billion, one hundred five million, seven hundred eighteen thousand, one hundred one".