53511651648 has 336 divisors, whose sum is σ = 194688927360. Its totient is φ = 14112423936.

The previous prime is 53511651631. The next prime is 53511651659. The reversal of 53511651648 is 84615611535.

It is a happy number.

53511651648 is a `hidden beast` number, since 535 + 1 + 1 + 6 + 51 + 64 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a super-2 number, since 2×53511651648² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2031136 + ... + 2057312.

Almost surely, 2^53511651648 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 53511651648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97344463680).

53511651648 is an abundant number, since it is smaller than the sum of its proper divisors (141177275712).

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

53511651648 is a wasteful number, since it uses less digits than its factorization.

53511651648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26231 (or 26202 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The spelling of 53511651648 in words is "fifty-three billion, five hundred eleven million, six hundred fifty-one thousand, six hundred forty-eight".