1156860813 has 8 divisors (see below), whose sum is σ = 1543061728. Its totient is φ = 770950224.

The previous prime is 1156860811. The next prime is 1156860823. The reversal of 1156860813 is 3180686511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1156860813 - 2¹ = 1156860811 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 (1156860811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63106 + ... + 79347.

It is an arithmetic number, because the mean of its divisors is an integer number (192882716).

Almost surely, 2^1156860813 is an apocalyptic number.

It is an amenable number.

1156860813 is a deficient number, since it is larger than the sum of its proper divisors (386200915).

1156860813 is a wasteful number, since it uses less digits than its factorization.

1156860813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145163.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 1156860813 is about 34012.6566589556. The cubic root of 1156860813 is about 1049.7689024288.

The spelling of 1156860813 in words is "one billion, one hundred fifty-six million, eight hundred sixty thousand, eight hundred thirteen".