55145522081 has 8 divisors (see below), whose sum is σ = 62513142720. Its totient is φ = 48224423952.

The previous prime is 55145522059. The next prime is 55145522099. The reversal of 55145522081 is 18022554155.

It is a happy number.

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 55145522081 - 2³⁴ = 37965652897 is a prime.

It is a super-2 number, since 2×55145522081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55145522051) 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, 111630365 + ... + 111630858.

It is an arithmetic number, because the mean of its divisors is an integer number (7814142840).

Almost surely, 2^55145522081 is an apocalyptic number.

It is an amenable number.

55145522081 is a deficient number, since it is larger than the sum of its proper divisors (7367620639).

55145522081 is a wasteful number, since it uses less digits than its factorization.

55145522081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223261255.

The product of its (nonzero) digits is 80000, while the sum is 38.

The spelling of 55145522081 in words is "fifty-five billion, one hundred forty-five million, five hundred twenty-two thousand, eighty-one".