53220999888 has 640 divisors, whose sum is σ = 188467937280. Its totient is φ = 14059008000.

The previous prime is 53220999869. The next prime is 53220999899. The reversal of 53220999888 is 88899902235.

53220999888 is a `hidden beast` number, since 532 + 2 + 0 + 9 + 9 + 98 + 8 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 234453631 + ... + 234453857.

It is an arithmetic number, because the mean of its divisors is an integer number (294481152).

Almost surely, 2^53220999888 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 53220999888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94233968640).

53220999888 is an abundant number, since it is smaller than the sum of its proper divisors (135246937392).

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

53220999888 is a wasteful number, since it uses less digits than its factorization.

53220999888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The spelling of 53220999888 in words is "fifty-three billion, two hundred twenty million, nine hundred ninety-nine thousand, eight hundred eighty-eight".