649135154 has 4 divisors (see below), whose sum is σ = 973702734. Its totient is φ = 324567576.

The previous prime is 649135153. The next prime is 649135177. The reversal of 649135154 is 451531946.

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., 572309929 + 76825225 = 23923^2 + 8765^2 .

It is not an unprimeable number, because it can be changed into a prime (649135153) 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 as a sum of consecutive naturals, namely, 162283787 + ... + 162283790.

Almost surely, 2^649135154 is an apocalyptic number.

649135154 is a deficient number, since it is larger than the sum of its proper divisors (324567580).

649135154 is a wasteful number, since it uses less digits than its factorization.

649135154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324567579.

The product of its digits is 64800, while the sum is 38.

The square root of 649135154 is about 25478.1308969084. The cubic root of 649135154 is about 865.8547484521.

The spelling of 649135154 in words is "six hundred forty-nine million, one hundred thirty-five thousand, one hundred fifty-four".