55181075501440 has 64 divisors (see below), whose sum is σ = 150762581292960. Its totient is φ = 18919225884672.

The previous prime is 55181075501423. The next prime is 55181075501443. The reversal of 55181075501440 is 4410557018155.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55181075501443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6158597697 + ... + 6158606656.

Almost surely, 2^{55181075501440} is an apocalyptic number.

It is an amenable number.

55181075501440 is an abundant number, since it is smaller than the sum of its proper divisors (95581505791520).

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

55181075501440 is a wasteful number, since it uses less digits than its factorization.

55181075501440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12317204379 (or 12317204367 counting only the distinct ones).

The product of its (nonzero) digits is 560000, while the sum is 46.

The spelling of 55181075501440 in words is "fifty-five trillion, one hundred eighty-one billion, seventy-five million, five hundred one thousand, four hundred forty".