649596445 has 4 divisors (see below), whose sum is σ = 779515740. Its totient is φ = 519677152.

The previous prime is 649596419. The next prime is 649596463. The reversal of 649596445 is 544695946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 453988249 + 195608196 = 21307^2 + 13986^2 .

It is a cyclic number.

It is not a de Polignac number, because 649596445 - 2¹¹ = 649594397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 649596392 and 649596401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64959640 + ... + 64959649.

It is an arithmetic number, because the mean of its divisors is an integer number (194878935).

Almost surely, 2^649596445 is an apocalyptic number.

It is an amenable number.

649596445 is a deficient number, since it is larger than the sum of its proper divisors (129919295).

649596445 is a wasteful number, since it uses less digits than its factorization.

649596445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129919294.

The product of its digits is 4665600, while the sum is 52.

The square root of 649596445 is about 25487.1819744749. The cubic root of 649596445 is about 866.0597989347.

The spelling of 649596445 in words is "six hundred forty-nine million, five hundred ninety-six thousand, four hundred forty-five".