1128694962691 has 4 divisors (see below), whose sum is σ = 1145541156232. Its totient is φ = 1111848769152.

The previous prime is 1128694962673. The next prime is 1128694962719. The reversal of 1128694962691 is 1962694968211.

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 1128694962691 - 2²³ = 1128686574083 is a prime.

It is a super-2 number, since 2×1128694962691² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128694962091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8423096670 + ... + 8423096803.

It is an arithmetic number, because the mean of its divisors is an integer number (286385289058).

Almost surely, 2^{1128694962691} is an apocalyptic number.

1128694962691 is a deficient number, since it is larger than the sum of its proper divisors (16846193541).

1128694962691 is an equidigital number, since it uses as much as digits as its factorization.

1128694962691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16846193540.

The product of its digits is 20155392, while the sum is 64.

The spelling of 1128694962691 in words is "one trillion, one hundred twenty-eight billion, six hundred ninety-four million, nine hundred sixty-two thousand, six hundred ninety-one".