3128854804991 has 16 divisors (see below), whose sum is σ = 3269784268800. Its totient is φ = 2990553488640.

The previous prime is 3128854804987. The next prime is 3128854804997. The reversal of 3128854804991 is 1994084588213.

It is a cyclic number.

It is not a de Polignac number, because 3128854804991 - 2² = 3128854804987 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 (3128854804997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396110 + ... + 2532708.

It is an arithmetic number, because the mean of its divisors is an integer number (204361516800).

Almost surely, 2^{3128854804991} is an apocalyptic number.

3128854804991 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3128854804991 is a deficient number, since it is larger than the sum of its proper divisors (140929463809).

3128854804991 is a wasteful number, since it uses less digits than its factorization.

3128854804991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137214.

The product of its (nonzero) digits is 19906560, while the sum is 62.

The spelling of 3128854804991 in words is "three trillion, one hundred twenty-eight billion, eight hundred fifty-four million, eight hundred four thousand, nine hundred ninety-one".