649753117328 has 160 divisors (see below), whose sum is σ = 1563136952832. Its totient is φ = 255599308800.

The previous prime is 649753117297. The next prime is 649753117381. The reversal of 649753117328 is 823711357946.

It is a super-2 number, since 2×649753117328² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6392150 + ... + 6493002.

Almost surely, 2^649753117328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649753117328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (781568476416).

649753117328 is an abundant number, since it is smaller than the sum of its proper divisors (913383835504).

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

649753117328 is a wasteful number, since it uses less digits than its factorization.

649753117328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100993 (or 100987 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 56.

The spelling of 649753117328 in words is "six hundred forty-nine billion, seven hundred fifty-three million, one hundred seventeen thousand, three hundred twenty-eight".