617628813 has 16 divisors (see below), whose sum is σ = 840032256. Its totient is φ = 403567920.

The previous prime is 617628811. The next prime is 617628829. The reversal of 617628813 is 318826716.

It is not a de Polignac number, because 617628813 - 2¹ = 617628811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617628811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21858 + ... + 41388.

It is an arithmetic number, because the mean of its divisors is an integer number (52502016).

Almost surely, 2^617628813 is an apocalyptic number.

It is an amenable number.

617628813 is a deficient number, since it is larger than the sum of its proper divisors (222403443).

617628813 is a wasteful number, since it uses less digits than its factorization.

617628813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19744.

The product of its digits is 96768, while the sum is 42.

The square root of 617628813 is about 24852.1390025084. The cubic root of 617628813 is about 851.6134581405.

The spelling of 617628813 in words is "six hundred seventeen million, six hundred twenty-eight thousand, eight hundred thirteen".