2251725943545 has 24 divisors (see below), whose sum is σ = 4203221762376. Its totient is φ = 1108542002688.

The previous prime is 2251725943507. The next prime is 2251725943553. The reversal of 2251725943545 is 5453495271522.

2251725943545 is a `hidden beast` number, since 2 + 2 + 5 + 1 + 7 + 2 + 5 + 94 + 3 + 545 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 550023956496 + 1701701987049 = 741636^2 + 1304493^2 .

It is not a de Polignac number, because 2251725943545 - 2⁷ = 2251725943417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2251725943491 and 2251725943500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1924551504 + ... + 1924552673.

It is an arithmetic number, because the mean of its divisors is an integer number (175134240099).

Almost surely, 2^{2251725943545} is an apocalyptic number.

It is an amenable number.

2251725943545 is a deficient number, since it is larger than the sum of its proper divisors (1951495818831).

2251725943545 is a wasteful number, since it uses less digits than its factorization.

2251725943545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3849104201 (or 3849104198 counting only the distinct ones).

The product of its digits is 15120000, while the sum is 54.

The spelling of 2251725943545 in words is "two trillion, two hundred fifty-one billion, seven hundred twenty-five million, nine hundred forty-three thousand, five hundred forty-five".