55533140661 has 8 divisors (see below), whose sum is σ = 78399728064. Its totient is φ = 34844323520.

The previous prime is 55533140647. The next prime is 55533140737. The reversal of 55533140661 is 16604133555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55533140661 - 2⁵ = 55533140629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55533140161) 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 7 ways as a sum of consecutive naturals, for example, 544442505 + ... + 544442606.

It is an arithmetic number, because the mean of its divisors is an integer number (9799966008).

Almost surely, 2^55533140661 is an apocalyptic number.

55533140661 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

55533140661 is a deficient number, since it is larger than the sum of its proper divisors (22866587403).

55533140661 is a wasteful number, since it uses less digits than its factorization.

55533140661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088885131.

The product of its (nonzero) digits is 162000, while the sum is 39.

The spelling of 55533140661 in words is "fifty-five billion, five hundred thirty-three million, one hundred forty thousand, six hundred sixty-one".