649975349088 has 576 divisors, whose sum is σ = 2188274175360. Its totient is φ = 181075378176.

The previous prime is 649975349063. The next prime is 649975349113. The reversal of 649975349088 is 880943579946.

649975349088 is a `hidden beast` number, since 6 + 4 + 9 + 9 + 7 + 53 + 490 + 88 = 666.

It is an interprime number because it is at equal distance from previous prime (649975349063) and next prime (649975349113).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 732778981 + ... + 732779867.

It is an arithmetic number, because the mean of its divisors is an integer number (3799087110).

Almost surely, 2^649975349088 is an apocalyptic number.

649975349088 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649975349088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1094137087680).

649975349088 is an abundant number, since it is smaller than the sum of its proper divisors (1538298826272).

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

649975349088 is a wasteful number, since it uses less digits than its factorization.

649975349088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359 (or 1348 counting only the distinct ones).

The product of its (nonzero) digits is 470292480, while the sum is 72.

The spelling of 649975349088 in words is "six hundred forty-nine billion, nine hundred seventy-five million, three hundred forty-nine thousand, eighty-eight".