2128620860851 has 8 divisors (see below), whose sum is σ = 2141662798800. Its totient is φ = 2115615817728.

The previous prime is 2128620860819. The next prime is 2128620861007. The reversal of 2128620860851 is 1580680268212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2128620860851 - 2⁵ = 2128620860819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2128620860795 and 2128620860804.

It is not an unprimeable number, because it can be changed into a prime (2128620860801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9107961 + ... + 9338746.

It is an arithmetic number, because the mean of its divisors is an integer number (267707849850).

Almost surely, 2^{2128620860851} is an apocalyptic number.

2128620860851 is a deficient number, since it is larger than the sum of its proper divisors (13041937949).

2128620860851 is a wasteful number, since it uses less digits than its factorization.

2128620860851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18447413.

The product of its (nonzero) digits is 737280, while the sum is 49.

The spelling of 2128620860851 in words is "two trillion, one hundred twenty-eight billion, six hundred twenty million, eight hundred sixty thousand, eight hundred fifty-one".