2128586408747 has 16 divisors (see below), whose sum is σ = 2146368818880. Its totient is φ = 2110885152768.

The previous prime is 2128586408687. The next prime is 2128586408777. The reversal of 2128586408747 is 7478046858212.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2128586408747 is a prime.

It is a super-2 number, since 2×2128586408747² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2128586408747.

It is not an unprimeable number, because it can be changed into a prime (2128586408777) 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, 82206779 + ... + 82232667.

It is an arithmetic number, because the mean of its divisors is an integer number (134148051180).

Almost surely, 2^{2128586408747} is an apocalyptic number.

2128586408747 is a deficient number, since it is larger than the sum of its proper divisors (17782410133).

2128586408747 is a wasteful number, since it uses less digits than its factorization.

2128586408747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27430.

The product of its (nonzero) digits is 48168960, while the sum is 62.

The spelling of 2128586408747 in words is "two trillion, one hundred twenty-eight billion, five hundred eighty-six million, four hundred eight thousand, seven hundred forty-seven".