649278135 has 36 divisors (see below), whose sum is σ = 1237037256. Its totient is φ = 314798880.

The previous prime is 649278107. The next prime is 649278137. The reversal of 649278135 is 531872946.

It is not a de Polignac number, because 649278135 - 2¹⁴ = 649261751 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649278137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 54177 + ... + 65066.

It is an arithmetic number, because the mean of its divisors is an integer number (34362146).

Almost surely, 2^649278135 is an apocalyptic number.

649278135 is a deficient number, since it is larger than the sum of its proper divisors (587759121).

649278135 is a wasteful number, since it uses less digits than its factorization.

649278135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119276 (or 119262 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 649278135 is about 25480.9366978532. The cubic root of 649278135 is about 865.9183159483.

It can be divided in two parts, 649 and 278135, that added together give a square (278784 = 528²).

The spelling of 649278135 in words is "six hundred forty-nine million, two hundred seventy-eight thousand, one hundred thirty-five".