611728645 has 16 divisors (see below), whose sum is σ = 801565632. Its totient is φ = 444472960.

The previous prime is 611728643. The next prime is 611728669. The reversal of 611728645 is 546827116.

It is not a de Polignac number, because 611728645 - 2¹ = 611728643 is a prime.

It is a super-2 number, since 2×611728645² = 748423870227072050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 611728598 and 611728607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611728643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60954 + ... + 70276.

It is an arithmetic number, because the mean of its divisors is an integer number (50097852).

Almost surely, 2^611728645 is an apocalyptic number.

It is an amenable number.

611728645 is a deficient number, since it is larger than the sum of its proper divisors (189836987).

611728645 is a wasteful number, since it uses less digits than its factorization.

611728645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10532.

The product of its digits is 80640, while the sum is 40.

The square root of 611728645 is about 24733.1487077566. The cubic root of 611728645 is about 848.8929740786.

The spelling of 611728645 in words is "six hundred eleven million, seven hundred twenty-eight thousand, six hundred forty-five".