649512270 has 216 divisors, whose sum is σ = 1966785912. Its totient is φ = 154107360.

The previous prime is 649512263. The next prime is 649512277. The reversal of 649512270 is 72215946.

649512270 is a `hidden beast` number, since 649 + 5 + 1 + 2 + 2 + 7 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (649512263) and next prime (649512277).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649512277) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 13819387 + ... + 13819433.

Almost surely, 2^649512270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649512270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (983392956).

649512270 is an abundant number, since it is smaller than the sum of its proper divisors (1317273642).

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

649512270 is a wasteful number, since it uses less digits than its factorization.

649512270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 649512270 is about 25485.5306007154. The cubic root of 649512270 is about 866.0223891791.

The spelling of 649512270 in words is "six hundred forty-nine million, five hundred twelve thousand, two hundred seventy".