617628649 has 24 divisors (see below), whose sum is σ = 756695520. Its totient is φ = 500607360.

The previous prime is 617628629. The next prime is 617628659. The reversal of 617628649 is 946826716.

It is not a de Polignac number, because 617628649 - 2⁵ = 617628617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (617628629) 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 23 ways as a sum of consecutive naturals, for example, 31182 + ... + 46984.

It is an arithmetic number, because the mean of its divisors is an integer number (31528980).

Almost surely, 2^617628649 is an apocalyptic number.

It is an amenable number.

617628649 is a deficient number, since it is larger than the sum of its proper divisors (139066871).

617628649 is a wasteful number, since it uses less digits than its factorization.

617628649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15861 (or 15850 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The square root of 617628649 is about 24852.1357029934. The cubic root of 617628649 is about 851.6133827637.

The spelling of 617628649 in words is "six hundred seventeen million, six hundred twenty-eight thousand, six hundred forty-nine".