649620255 has 8 divisors (see below), whose sum is σ = 1039392432. Its totient is φ = 346464128.

The previous prime is 649620247. The next prime is 649620263. The reversal of 649620255 is 552026946.

It is an interprime number because it is at equal distance from previous prime (649620247) and next prime (649620263).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 649620255 - 2³ = 649620247 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21653994 + ... + 21654023.

It is an arithmetic number, because the mean of its divisors is an integer number (129924054).

Almost surely, 2^649620255 is an apocalyptic number.

649620255 is a deficient number, since it is larger than the sum of its proper divisors (389772177).

649620255 is a wasteful number, since it uses less digits than its factorization.

649620255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43308025.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 649620255 is about 25487.6490677347. The cubic root of 649620255 is about 866.0703801871.

The spelling of 649620255 in words is "six hundred forty-nine million, six hundred twenty thousand, two hundred fifty-five".