1128854146861 has 4 divisors (see below), whose sum is σ = 1290119024992. Its totient is φ = 967589268732.

The previous prime is 1128854146799. The next prime is 1128854146877. The reversal of 1128854146861 is 1686414588211.

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 a cyclic number.

It is not a de Polignac number, because 1128854146861 - 2⁹ = 1128854146349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128854146561) 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, 80632439055 + ... + 80632439068.

It is an arithmetic number, because the mean of its divisors is an integer number (322529756248).

Almost surely, 2^{1128854146861} is an apocalyptic number.

It is an amenable number.

1128854146861 is a deficient number, since it is larger than the sum of its proper divisors (161264878131).

1128854146861 is an equidigital number, since it uses as much as digits as its factorization.

1128854146861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161264878130.

The product of its digits is 2949120, while the sum is 55.

The spelling of 1128854146861 in words is "one trillion, one hundred twenty-eight billion, eight hundred fifty-four million, one hundred forty-six thousand, eight hundred sixty-one".