2777725121 has 4 divisors (see below), whose sum is σ = 2923921200. Its totient is φ = 2631529044.

The previous prime is 2777725109. The next prime is 2777725127. The reversal of 2777725121 is 1215277772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2777725121 - 2¹⁴ = 2777708737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2777725127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73098011 + ... + 73098048.

It is an arithmetic number, because the mean of its divisors is an integer number (730980300).

Almost surely, 2^2777725121 is an apocalyptic number.

It is an amenable number.

2777725121 is a deficient number, since it is larger than the sum of its proper divisors (146196079).

2777725121 is a wasteful number, since it uses less digits than its factorization.

2777725121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146196078.

The product of its digits is 96040, while the sum is 41.

The square root of 2777725121 is about 52704.1281210495. The cubic root of 2777725121 is about 1405.7122262908.

The spelling of 2777725121 in words is "two billion, seven hundred seventy-seven million, seven hundred twenty-five thousand, one hundred twenty-one".