649416722 has 4 divisors (see below), whose sum is σ = 974125086. Its totient is φ = 324708360.

The previous prime is 649416721. The next prime is 649416727. The reversal of 649416722 is 227614946.

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., 629959801 + 19456921 = 25099^2 + 4411^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 649416722.

It is not an unprimeable number, because it can be changed into a prime (649416721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162354179 + ... + 162354182.

Almost surely, 2^649416722 is an apocalyptic number.

649416722 is a deficient number, since it is larger than the sum of its proper divisors (324708364).

649416722 is a wasteful number, since it uses less digits than its factorization.

649416722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324708363.

The product of its digits is 145152, while the sum is 41.

The square root of 649416722 is about 25483.6559779008. The cubic root of 649416722 is about 865.9799210232.

The spelling of 649416722 in words is "six hundred forty-nine million, four hundred sixteen thousand, seven hundred twenty-two".