649073626 has 4 divisors (see below), whose sum is σ = 973610442. Its totient is φ = 324536812.

The previous prime is 649073609. The next prime is 649073627. The reversal of 649073626 is 626370946.

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

It can be written as a sum of positive squares in only one way, i.e., 333975625 + 315098001 = 18275^2 + 17751^2 .

It is not an unprimeable number, because it can be changed into a prime (649073627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162268405 + ... + 162268408.

Almost surely, 2^649073626 is an apocalyptic number.

649073626 is a deficient number, since it is larger than the sum of its proper divisors (324536816).

649073626 is a wasteful number, since it uses less digits than its factorization.

649073626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324536815.

The product of its (nonzero) digits is 326592, while the sum is 43.

The square root of 649073626 is about 25476.9234013842. The cubic root of 649073626 is about 865.8273910295.

The spelling of 649073626 in words is "six hundred forty-nine million, seventy-three thousand, six hundred twenty-six".