55438137036 has 72 divisors (see below), whose sum is σ = 144557540400. Its totient is φ = 17900631936.

The previous prime is 55438137023. The next prime is 55438137049. The reversal of 55438137036 is 63073183455.

55438137036 is a `hidden beast` number, since 5 + 543 + 8 + 1 + 3 + 70 + 36 = 666.

It is an interprime number because it is at equal distance from previous prime (55438137023) and next prime (55438137049).

It is a junction number, because it is equal to n+sod(n) for n = 55438136982 and 55438137000.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 210690 + ... + 394038.

Almost surely, 2^55438137036 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 55438137036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72278770200).

55438137036 is an abundant number, since it is smaller than the sum of its proper divisors (89119403364).

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

55438137036 is a wasteful number, since it uses less digits than its factorization.

55438137036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183623 (or 183618 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 55438137036 in words is "fifty-five billion, four hundred thirty-eight million, one hundred thirty-seven thousand, thirty-six".