649340154 has 24 divisors (see below), whose sum is σ = 1411716852. Its totient is φ = 215706240.

The previous prime is 649340129. The next prime is 649340161. The reversal of 649340154 is 451043946.

649340154 is a `hidden beast` number, since 649 + 3 + 4 + 0 + 1 + 5 + 4 = 666.

649340154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 508277025 + 141063129 = 22545^2 + 11877^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56287 + ... + 66834.

Almost surely, 2^649340154 is an apocalyptic number.

649340154 is an abundant number, since it is smaller than the sum of its proper divisors (762376698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649340154 is a wasteful number, since it uses less digits than its factorization.

649340154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123422 (or 123419 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 649340154 is about 25482.1536373989. The cubic root of 649340154 is about 865.9458858886.

The spelling of 649340154 in words is "six hundred forty-nine million, three hundred forty thousand, one hundred fifty-four".