2877738561 has 12 divisors (see below), whose sum is σ = 4197890580. Its totient is φ = 1899496800.

The previous prime is 2877738557. The next prime is 2877738581. The reversal of 2877738561 is 1658377782.

2877738561 is a `hidden beast` number, since 2 + 8 + 7 + 7 + 73 + 8 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2813241600 + 64496961 = 53040^2 + 8031^2 .

It is not a de Polignac number, because 2877738561 - 2² = 2877738557 is a prime.

It is a super-3 number, since 3×2877738561³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2877738498 and 2877738507.

It is not an unprimeable number, because it can be changed into a prime (2877738581) 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, 1582006 + ... + 1583823.

It is an arithmetic number, because the mean of its divisors is an integer number (349824215).

Almost surely, 2^2877738561 is an apocalyptic number.

It is an amenable number.

2877738561 is a deficient number, since it is larger than the sum of its proper divisors (1320152019).

2877738561 is a wasteful number, since it uses less digits than its factorization.

2877738561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165936 (or 3165933 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The square root of 2877738561 is about 53644.5576083912. The cubic root of 2877738561 is about 1422.3848308924.

The spelling of 2877738561 in words is "two billion, eight hundred seventy-seven million, seven hundred thirty-eight thousand, five hundred sixty-one".