2081549377 has 12 divisors (see below), whose sum is σ = 2265140556. Its totient is φ = 1911311360.

The previous prime is 2081549363. The next prime is 2081549453. The reversal of 2081549377 is 7739451802.

It is a Cunningham number, because it is equal to 45624²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 100320256 + 1981229121 = 10016^2 + 44511^2 .

It is not a de Polignac number, because 2081549377 - 2¹¹ = 2081547329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2081549357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75988 + ... + 99685.

It is an arithmetic number, because the mean of its divisors is an integer number (188761713).

Almost surely, 2^2081549377 is an apocalyptic number.

It is an amenable number.

2081549377 is a deficient number, since it is larger than the sum of its proper divisors (183591179).

2081549377 is a wasteful number, since it uses less digits than its factorization.

2081549377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175748 (or 175731 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 2081549377 is about 45624.0000109591. Note that the first 4 decimals coincide. The cubic root of 2081549377 is about 1276.8177332011.

The spelling of 2081549377 in words is "two billion, eighty-one million, five hundred forty-nine thousand, three hundred seventy-seven".