54971527081 has 4 divisors (see below), whose sum is σ = 54982586052. Its totient is φ = 54960468112.

The previous prime is 54971527067. The next prime is 54971527087. The reversal of 54971527081 is 18072517945.

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 38657851456 + 16313675625 = 196616^2 + 127725^2 .

It is a cyclic number.

It is not a de Polignac number, because 54971527081 - 2⁵ = 54971527049 is a prime.

It is a super-2 number, since 2×54971527081² (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 (54971527087) 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, 5522026 + ... + 5531971.

It is an arithmetic number, because the mean of its divisors is an integer number (13745646513).

Almost surely, 2^54971527081 is an apocalyptic number.

It is an amenable number.

54971527081 is a deficient number, since it is larger than the sum of its proper divisors (11058971).

54971527081 is a wasteful number, since it uses less digits than its factorization.

54971527081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11058970.

The product of its (nonzero) digits is 705600, while the sum is 49.

The spelling of 54971527081 in words is "fifty-four billion, nine hundred seventy-one million, five hundred twenty-seven thousand, eighty-one".