2081780871801 has 16 divisors (see below), whose sum is σ = 2865285742080. Its totient is φ = 1343066175360.

The previous prime is 2081780871799. The next prime is 2081780871803. The reversal of 2081780871801 is 1081780871802.

It is an interprime number because it is at equal distance from previous prime (2081780871799) and next prime (2081780871803).

It is not a de Polignac number, because 2081780871801 - 2¹ = 2081780871799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2081780871803) 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, 11487571 + ... + 11667383.

It is an arithmetic number, because the mean of its divisors is an integer number (179080358880).

Almost surely, 2^{2081780871801} is an apocalyptic number.

It is an amenable number.

2081780871801 is a deficient number, since it is larger than the sum of its proper divisors (783504870279).

2081780871801 is a wasteful number, since it uses less digits than its factorization.

2081780871801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304336.

The product of its (nonzero) digits is 401408, while the sum is 51.

Subtracting from 2081780871801 its reverse (1081780871802), we obtain a palindrome (999999999999).

The spelling of 2081780871801 in words is "two trillion, eighty-one billion, seven hundred eighty million, eight hundred seventy-one thousand, eight hundred one".