2545645477 has 4 divisors (see below), whose sum is σ = 2545766496. Its totient is φ = 2545524460.

The previous prime is 2545645471. The next prime is 2545645523. The reversal of 2545645477 is 7745465452.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2545645477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2545645477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545645471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19849 + ... + 74062.

It is an arithmetic number, because the mean of its divisors is an integer number (636441624).

Almost surely, 2^2545645477 is an apocalyptic number.

It is an amenable number.

2545645477 is a deficient number, since it is larger than the sum of its proper divisors (121019).

2545645477 is an equidigital number, since it uses as much as digits as its factorization.

2545645477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121018.

The product of its digits is 4704000, while the sum is 49.

The square root of 2545645477 is about 50454.3900666731. The cubic root of 2545645477 is about 1365.4190999765.

The spelling of 2545645477 in words is "two billion, five hundred forty-five million, six hundred forty-five thousand, four hundred seventy-seven".