55581489087804 has 36 divisors (see below), whose sum is σ = 140555638191696. Its totient is φ = 18519516626688.

The previous prime is 55581489087791. The next prime is 55581489087809. The reversal of 55581489087804 is 40878098418555.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55581489087809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 318511669 + ... + 318686124.

Almost surely, 2^{55581489087804} is an apocalyptic number.

It is an amenable number.

55581489087804 is an abundant number, since it is smaller than the sum of its proper divisors (84974149103892).

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

55581489087804 is a wasteful number, since it uses less digits than its factorization.

55581489087804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637200226 (or 637200221 counting only the distinct ones).

The product of its (nonzero) digits is 516096000, while the sum is 72.

The spelling of 55581489087804 in words is "fifty-five trillion, five hundred eighty-one billion, four hundred eighty-nine million, eighty-seven thousand, eight hundred four".