2545763121 has 32 divisors (see below), whose sum is σ = 4247101440. Its totient is φ = 1493110800.

The previous prime is 2545763117. The next prime is 2545763123. The reversal of 2545763121 is 1213675452.

2545763121 is a `hidden beast` number, since 2 + 54 + 576 + 31 + 2 + 1 = 666.

It is not a de Polignac number, because 2545763121 - 2² = 2545763117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2545763123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129045 + ... + 147458.

It is an arithmetic number, because the mean of its divisors is an integer number (132721920).

Almost surely, 2^2545763121 is an apocalyptic number.

It is an amenable number.

2545763121 is a deficient number, since it is larger than the sum of its proper divisors (1701338319).

2545763121 is a wasteful number, since it uses less digits than its factorization.

2545763121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276554 (or 276548 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 2545763121 is about 50455.5558982358. Note that the first 3 decimals coincide. The cubic root of 2545763121 is about 1365.4401333963.

The spelling of 2545763121 in words is "two billion, five hundred forty-five million, seven hundred sixty-three thousand, one hundred twenty-one".