55185223155861 has 8 divisors (see below), whose sum is σ = 74117380005504. Its totient is φ = 36521607538400.

The previous prime is 55185223155841. The next prime is 55185223155871. The reversal of 55185223155861 is 16855132258155.

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 55185223155861 - 2²⁵ = 55185189601429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55185223155841) 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, 67135307565 + ... + 67135308386.

It is an arithmetic number, because the mean of its divisors is an integer number (9264672500688).

Almost surely, 2^{55185223155861} is an apocalyptic number.

It is an amenable number.

55185223155861 is a deficient number, since it is larger than the sum of its proper divisors (18932156849643).

55185223155861 is a wasteful number, since it uses less digits than its factorization.

55185223155861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134270616091.

The product of its digits is 14400000, while the sum is 57.

The spelling of 55185223155861 in words is "fifty-five trillion, one hundred eighty-five billion, two hundred twenty-three million, one hundred fifty-five thousand, eight hundred sixty-one".