55403891543 has 32 divisors (see below), whose sum is σ = 74609633280. Its totient is φ = 39732456960.

The previous prime is 55403891533. The next prime is 55403891581. The reversal of 55403891543 is 34519830455.

It is a de Polignac number, because none of the positive numbers 2^k-55403891543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55403891533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255218 + ... + 419456.

It is an arithmetic number, because the mean of its divisors is an integer number (2331551040).

Almost surely, 2^55403891543 is an apocalyptic number.

55403891543 is a deficient number, since it is larger than the sum of its proper divisors (19205741737).

55403891543 is a wasteful number, since it uses less digits than its factorization.

55403891543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164607.

The product of its (nonzero) digits is 1296000, while the sum is 47.

The spelling of 55403891543 in words is "fifty-five billion, four hundred three million, eight hundred ninety-one thousand, five hundred forty-three".