649639864270 has 32 divisors (see below), whose sum is σ = 1262268774720. Its totient is φ = 239986897920.

The previous prime is 649639864267. The next prime is 649639864273. The reversal of 649639864270 is 72468936946.

It is an interprime number because it is at equal distance from previous prime (649639864267) and next prime (649639864273).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649639864273) 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, 48691971 + ... + 48705310.

It is an arithmetic number, because the mean of its divisors is an integer number (39445899210).

Almost surely, 2^649639864270 is an apocalyptic number.

649639864270 is a deficient number, since it is larger than the sum of its proper divisors (612628910450).

649639864270 is a wasteful number, since it uses less digits than its factorization.

649639864270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97397340.

The product of its (nonzero) digits is 94058496, while the sum is 64.

The spelling of 649639864270 in words is "six hundred forty-nine billion, six hundred thirty-nine million, eight hundred sixty-four thousand, two hundred seventy".