625723389749 has 4 divisors (see below), whose sum is σ = 627950163660. Its totient is φ = 623496615840.

The previous prime is 625723389701. The next prime is 625723389751. The reversal of 625723389749 is 947983327526.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 142719239524 + 483004150225 = 377782^2 + 694985^2 .

It is a cyclic number.

It is not a de Polignac number, because 625723389749 - 2²⁰ = 625722341173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625723389769) 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, 1113386534 + ... + 1113387095.

It is an arithmetic number, because the mean of its divisors is an integer number (156987540915).

Almost surely, 2^625723389749 is an apocalyptic number.

It is an amenable number.

625723389749 is a deficient number, since it is larger than the sum of its proper divisors (2226773911).

625723389749 is a wasteful number, since it uses less digits than its factorization.

625723389749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226773910.

The product of its digits is 137168640, while the sum is 65.

The spelling of 625723389749 in words is "six hundred twenty-five billion, seven hundred twenty-three million, three hundred eighty-nine thousand, seven hundred forty-nine".