649660254 has 32 divisors (see below), whose sum is σ = 1387355904. Its totient is φ = 202319040.

The previous prime is 649660241. The next prime is 649660259. The reversal of 649660254 is 452066946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649660259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48807 + ... + 60674.

It is an arithmetic number, because the mean of its divisors is an integer number (43354872).

Almost surely, 2^649660254 is an apocalyptic number.

649660254 is an abundant number, since it is smaller than the sum of its proper divisors (737695650).

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

649660254 is a wasteful number, since it uses less digits than its factorization.

649660254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109552.

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 649660254 is about 25488.4337298313. The cubic root of 649660254 is about 866.0881553093.

The spelling of 649660254 in words is "six hundred forty-nine million, six hundred sixty thousand, two hundred fifty-four".