53287165440 has 400 divisors, whose sum is σ = 199173778848. Its totient is φ = 13590872064.

The previous prime is 53287165391. The next prime is 53287165489. The reversal of 53287165440 is 4456178235.

53287165440 is a `hidden beast` number, since 5 + 32 + 8 + 71 + 6 + 544 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (53287165391) and next prime (53287165489).

It is a Harshad number since it is a multiple of its sum of digits (45).

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 39 ways as a sum of consecutive naturals, for example, 4763694 + ... + 4774866.

Almost surely, 2^53287165440 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 53287165440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99586889424).

53287165440 is an abundant number, since it is smaller than the sum of its proper divisors (145886613408).

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

53287165440 is a wasteful number, since it uses less digits than its factorization.

53287165440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11231 (or 11206 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 53287165440 in words is "fifty-three billion, two hundred eighty-seven million, one hundred sixty-five thousand, four hundred forty".