54511401827681 has 4 divisors (see below), whose sum is σ = 55840948213764. Its totient is φ = 53181855441600.

The previous prime is 54511401827639. The next prime is 54511401827737. The reversal of 54511401827681 is 18672810411545.

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 2285977683025 + 52225424144656 = 1511945^2 + 7226716^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54511401827681 is a prime.

It is a super-2 number, since 2×54511401827681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54511401827581) 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, 664773192980 + ... + 664773193061.

It is an arithmetic number, because the mean of its divisors is an integer number (13960237053441).

Almost surely, 2^{54511401827681} is an apocalyptic number.

It is an amenable number.

54511401827681 is a deficient number, since it is larger than the sum of its proper divisors (1329546386083).

54511401827681 is a wasteful number, since it uses less digits than its factorization.

54511401827681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329546386082.

The product of its (nonzero) digits is 2150400, while the sum is 53.

The spelling of 54511401827681 in words is "fifty-four trillion, five hundred eleven billion, four hundred one million, eight hundred twenty-seven thousand, six hundred eighty-one".