55437236521920 has 2016 divisors, whose sum is σ = 220333269873600. Its totient is φ = 12790609920000.

The previous prime is 55437236521871. The next prime is 55437236521921. The reversal of 55437236521920 is 2912563273455.

55437236521920 is a `hidden beast` number, since 5 + 5 + 4 + 3 + 7 + 23 + 6 + 521 + 92 + 0 = 666.

55437236521920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55437236521921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 372061990006 + ... + 372061990154.

Almost surely, 2^{55437236521920} 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 55437236521920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110166634936800).

55437236521920 is an abundant number, since it is smaller than the sum of its proper divisors (164896033351680).

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

55437236521920 is a wasteful number, since it uses less digits than its factorization.

55437236521920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 54.

The spelling of 55437236521920 in words is "fifty-five trillion, four hundred thirty-seven billion, two hundred thirty-six million, five hundred twenty-one thousand, nine hundred twenty".