2545564623 has 16 divisors (see below), whose sum is σ = 3928058880.
Its totient is φ = 1436194656.
The previous prime is 2545564579. The next prime is 2545564627. The reversal of 2545564623 is 3264655452.
It is not a de Polignac number, because 2545564623 - 29 = 2545564111 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2545564627) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 765540 + ... + 768857.
It is an arithmetic number, because the mean of its divisors is an integer number (245503680).
Almost surely, 22545564623 is an apocalyptic number.
2545564623 is a deficient number, since it is larger than the sum of its proper divisors (1382494257).
2545564623 is a wasteful number, since it uses less digits than its factorization.
2545564623 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1534486.
The product of its digits is 864000, while the sum is 42.
The square root of 2545564623 is about 50453.5888019871.
The cubic root of 2545564623 is about 1365.4046438178.
The spelling of 2545564623 in words is "two billion, five hundred forty-five million, five hundred sixty-four thousand, six hundred twenty-three".