55430774081 has 4 divisors (see below), whose sum is σ = 55431502164. Its totient is φ = 55430046000.

The previous prime is 55430774071. The next prime is 55430774089. The reversal of 55430774081 is 18047703455.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44866017856 + 10564756225 = 211816^2 + 102785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55430774081 is a prime.

It is a super-2 number, since 2×55430774081² (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 (55430774089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234470 + ... + 407231.

It is an arithmetic number, because the mean of its divisors is an integer number (13857875541).

Almost surely, 2^55430774081 is an apocalyptic number.

It is an amenable number.

55430774081 is a deficient number, since it is larger than the sum of its proper divisors (728083).

55430774081 is an equidigital number, since it uses as much as digits as its factorization.

55430774081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728082.

The product of its (nonzero) digits is 470400, while the sum is 44.

The spelling of 55430774081 in words is "fifty-five billion, four hundred thirty million, seven hundred seventy-four thousand, eighty-one".