55136405140 has 96 divisors (see below), whose sum is σ = 126578833920. Its totient is φ = 20102898816.

The previous prime is 55136405131. The next prime is 55136405153. The reversal of 55136405140 is 4150463155.

It is a junction number, because it is equal to n+sod(n) for n = 55136405096 and 55136405105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1069599 + ... + 1119961.

It is an arithmetic number, because the mean of its divisors is an integer number (1318529520).

Almost surely, 2^55136405140 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 55136405140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63289416960).

55136405140 is an abundant number, since it is smaller than the sum of its proper divisors (71442428780).

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

55136405140 is a wasteful number, since it uses less digits than its factorization.

55136405140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50501 (or 50499 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 55136405140 its reverse (4150463155), we get a palindrome (59286868295).

The spelling of 55136405140 in words is "fifty-five billion, one hundred thirty-six million, four hundred five thousand, one hundred forty".