2545686417 has 4 divisors (see below), whose sum is σ = 3394248560. Its totient is φ = 1697124276.

The previous prime is 2545686413. The next prime is 2545686419. The reversal of 2545686417 is 7146865452.

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 not a de Polignac number, because 2545686417 - 2² = 2545686413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2545686413) 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 3 ways as a sum of consecutive naturals, for example, 424281067 + ... + 424281072.

It is an arithmetic number, because the mean of its divisors is an integer number (848562140).

Almost surely, 2^2545686417 is an apocalyptic number.

It is an amenable number.

2545686417 is a deficient number, since it is larger than the sum of its proper divisors (848562143).

2545686417 is an equidigital number, since it uses as much as digits as its factorization.

2545686417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848562142.

The product of its digits is 1612800, while the sum is 48.

The square root of 2545686417 is about 50454.7957780031. The cubic root of 2545686417 is about 1365.4264196601.

The spelling of 2545686417 in words is "two billion, five hundred forty-five million, six hundred eighty-six thousand, four hundred seventeen".