611867649 has 4 divisors (see below), whose sum is σ = 815823536. Its totient is φ = 407911764.

The previous prime is 611867629. The next prime is 611867687. The reversal of 611867649 is 946768116.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 611867649 - 2⁷ = 611867521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 611867598 and 611867607.

It is not an unprimeable number, because it can be changed into a prime (611867609) 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 3 ways as a sum of consecutive naturals, for example, 101977939 + ... + 101977944.

It is an arithmetic number, because the mean of its divisors is an integer number (203955884).

Almost surely, 2^611867649 is an apocalyptic number.

It is an amenable number.

611867649 is a deficient number, since it is larger than the sum of its proper divisors (203955887).

611867649 is a wasteful number, since it uses less digits than its factorization.

611867649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203955886.

The product of its digits is 435456, while the sum is 48.

The square root of 611867649 is about 24735.9586230249. The cubic root of 611867649 is about 848.9572676088.

The spelling of 611867649 in words is "six hundred eleven million, eight hundred sixty-seven thousand, six hundred forty-nine".