2120478855807 has 16 divisors (see below), whose sum is σ = 3086499610208. Its totient is φ = 1287034583040.

The previous prime is 2120478855779. The next prime is 2120478855811. The reversal of 2120478855807 is 7085588740212.

It is a happy number.

It is not a de Polignac number, because 2120478855807 - 2¹⁰ = 2120478854783 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120478855827) 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, 372402994 + ... + 372408687.

It is an arithmetic number, because the mean of its divisors is an integer number (192906225638).

Almost surely, 2^{2120478855807} is an apocalyptic number.

2120478855807 is a deficient number, since it is larger than the sum of its proper divisors (966020754401).

2120478855807 is a wasteful number, since it uses less digits than its factorization.

2120478855807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744811770.

The product of its (nonzero) digits is 10035200, while the sum is 57.

The spelling of 2120478855807 in words is "two trillion, one hundred twenty billion, four hundred seventy-eight million, eight hundred fifty-five thousand, eight hundred seven".