625609511 has 4 divisors (see below), whose sum is σ = 625665000. Its totient is φ = 625554024.

The previous prime is 625609487. The next prime is 625609519. The reversal of 625609511 is 115906526.

It is a semiprime because it is the product of two primes, 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-625609511 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 (625609519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4136 + ... + 35613.

It is an arithmetic number, because the mean of its divisors is an integer number (156416250).

Almost surely, 2^625609511 is an apocalyptic number.

625609511 is a deficient number, since it is larger than the sum of its proper divisors (55489).

625609511 is a wasteful number, since it uses less digits than its factorization.

625609511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55488.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 625609511 is about 25012.1872494190. The cubic root of 625609511 is about 855.2658161453.

The spelling of 625609511 in words is "six hundred twenty-five million, six hundred nine thousand, five hundred eleven".