2545956405 has 24 divisors (see below), whose sum is σ = 4427205120. Its totient is φ = 1353469920.

The previous prime is 2545956353. The next prime is 2545956419. The reversal of 2545956405 is 5046595452.

2545956405 is a `hidden beast` number, since 2 + 54 + 595 + 6 + 4 + 0 + 5 = 666.

It is not a de Polignac number, because 2545956405 - 2¹⁰ = 2545955381 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76965 + ... + 104954.

It is an arithmetic number, because the mean of its divisors is an integer number (184466880).

Almost surely, 2^2545956405 is an apocalyptic number.

It is an amenable number.

2545956405 is a deficient number, since it is larger than the sum of its proper divisors (1881248715).

2545956405 is a wasteful number, since it uses less digits than its factorization.

2545956405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182241 (or 182238 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The square root of 2545956405 is about 50457.4712505492. The cubic root of 2545956405 is about 1365.4746889879.

The spelling of 2545956405 in words is "two billion, five hundred forty-five million, nine hundred fifty-six thousand, four hundred five".