1156868663 has 4 divisors (see below), whose sum is σ = 1161169560. Its totient is φ = 1152567768.

The previous prime is 1156868659. The next prime is 1156868681. The reversal of 1156868663 is 3668686511.

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

It is a cyclic number.

It is not a de Polignac number, because 1156868663 - 2² = 1156868659 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 (1156868693) 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, 2150045 + ... + 2150582.

It is an arithmetic number, because the mean of its divisors is an integer number (290292390).

Almost surely, 2^1156868663 is an apocalyptic number.

1156868663 is a deficient number, since it is larger than the sum of its proper divisors (4300897).

1156868663 is an equidigital number, since it uses as much as digits as its factorization.

1156868663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300896.

The product of its digits is 1244160, while the sum is 50.

The square root of 1156868663 is about 34012.7720569788. The cubic root of 1156868663 is about 1049.7712768623.

The spelling of 1156868663 in words is "one billion, one hundred fifty-six million, eight hundred sixty-eight thousand, six hundred sixty-three".