616565149 has 8 divisors (see below), whose sum is σ = 623151320. Its totient is φ = 609996096.

The previous prime is 616565141. The next prime is 616565153. The reversal of 616565149 is 941565616.

It can be written as a sum of positive squares in 4 ways, for example, as 322202500 + 294362649 = 17950^2 + 17157^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 616565149 - 2³ = 616565141 is a prime.

It is a super-2 number, since 2×616565149² = 760305165922784402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616565141) 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 7 ways as a sum of consecutive naturals, for example, 76039 + ... + 83755.

It is an arithmetic number, because the mean of its divisors is an integer number (77893915).

Almost surely, 2^616565149 is an apocalyptic number.

It is an amenable number.

616565149 is a deficient number, since it is larger than the sum of its proper divisors (6586171).

616565149 is a wasteful number, since it uses less digits than its factorization.

616565149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8559.

The product of its digits is 194400, while the sum is 43.

The square root of 616565149 is about 24830.7299328876. The cubic root of 616565149 is about 851.1243018406.

The spelling of 616565149 in words is "six hundred sixteen million, five hundred sixty-five thousand, one hundred forty-nine".