55135426644 has 36 divisors (see below), whose sum is σ = 139539525216. Its totient is φ = 18356134608.

The previous prime is 55135426637. The next prime is 55135426673. The reversal of 55135426644 is 44662453155.

55135426644 is a `hidden beast` number, since 5 + 5 + 1 + 3 + 542 + 66 + 44 = 666.

55135426644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 55135426644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 900834 + ... + 960089.

Almost surely, 2^55135426644 is an apocalyptic number.

It is an amenable number.

55135426644 is an abundant number, since it is smaller than the sum of its proper divisors (84404098572).

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

55135426644 is a wasteful number, since it uses less digits than its factorization.

55135426644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1861756 (or 1861751 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 45.

Adding to 55135426644 its reverse (44662453155), we get a palindrome (99797879799).

The spelling of 55135426644 in words is "fifty-five billion, one hundred thirty-five million, four hundred twenty-six thousand, six hundred forty-four".