55403891544 has 32 divisors (see below), whose sum is σ = 138519083520. Its totient is φ = 18466716576.

The previous prime is 55403891533. The next prime is 55403891581. The reversal of 55403891544 is 44519830455.

It is a junction number, because it is equal to n+sod(n) for n = 55403891493 and 55403891502.

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 7 ways as a sum of consecutive naturals, for example, 327937 + ... + 467279.

It is an arithmetic number, because the mean of its divisors is an integer number (4328721360).

Almost surely, 2^55403891544 is an apocalyptic number.

It is an amenable number.

55403891544 is an abundant number, since it is smaller than the sum of its proper divisors (83115191976).

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

55403891544 is a wasteful number, since it uses less digits than its factorization.

55403891544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155919 (or 155915 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 48.

The spelling of 55403891544 in words is "fifty-five billion, four hundred three million, eight hundred ninety-one thousand, five hundred forty-four".