1156311407217 has 4 divisors (see below), whose sum is σ = 1541748542960. Its totient is φ = 770874271476.

The previous prime is 1156311407213. The next prime is 1156311407227. The reversal of 1156311407217 is 7127041136511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1156311407217 - 2² = 1156311407213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156311407213) 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, 192718567867 + ... + 192718567872.

It is an arithmetic number, because the mean of its divisors is an integer number (385437135740).

Almost surely, 2^{1156311407217} is an apocalyptic number.

It is an amenable number.

1156311407217 is a deficient number, since it is larger than the sum of its proper divisors (385437135743).

1156311407217 is an equidigital number, since it uses as much as digits as its factorization.

1156311407217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385437135742.

The product of its (nonzero) digits is 35280, while the sum is 39.

The spelling of 1156311407217 in words is "one trillion, one hundred fifty-six billion, three hundred eleven million, four hundred seven thousand, two hundred seventeen".