53437943808 has 208 divisors, whose sum is σ = 159516120960. Its totient is φ = 17677615104.

The previous prime is 53437943777. The next prime is 53437943827. The reversal of 53437943808 is 80834973435.

53437943808 is a `hidden beast` number, since 534 + 3 + 79 + 4 + 38 + 0 + 8 = 666.

It is a super-2 number, since 2×53437943808² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15149341 + ... + 15152867.

Almost surely, 2^53437943808 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 53437943808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79758060480).

53437943808 is an abundant number, since it is smaller than the sum of its proper divisors (106078177152).

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

53437943808 is a wasteful number, since it uses less digits than its factorization.

53437943808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3697 (or 3669 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 53437943808 in words is "fifty-three billion, four hundred thirty-seven million, nine hundred forty-three thousand, eight hundred eight".