625506813 has 16 divisors (see below), whose sum is σ = 927885760. Its totient is φ = 416460528.

The previous prime is 625506803. The next prime is 625506929. The reversal of 625506813 is 318605526.

It is not a de Polignac number, because 625506813 - 2¹⁰ = 625505789 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 (625506803) 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 15 ways as a sum of consecutive naturals, for example, 6531 + ... + 35967.

It is an arithmetic number, because the mean of its divisors is an integer number (57992860).

Almost surely, 2^625506813 is an apocalyptic number.

It is an amenable number.

625506813 is a deficient number, since it is larger than the sum of its proper divisors (302378947).

625506813 is a wasteful number, since it uses less digits than its factorization.

625506813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30233 (or 30227 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 625506813 is about 25010.1342059574. The cubic root of 625506813 is about 855.2190143763.

The spelling of 625506813 in words is "six hundred twenty-five million, five hundred six thousand, eight hundred thirteen".