27543994057 has 4 divisors (see below), whose sum is σ = 28741559040. Its totient is φ = 26346429076.

The previous prime is 27543994033. The next prime is 27543994091. The reversal of 27543994057 is 75049934572.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27543994057 is a prime.

It is a super-2 number, since 2×27543994057² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27543993989 and 27543994007.

It is not an unprimeable number, because it can be changed into a prime (27543994657) 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, 598782457 + ... + 598782502.

It is an arithmetic number, because the mean of its divisors is an integer number (7185389760).

Almost surely, 2^27543994057 is an apocalyptic number.

It is an amenable number.

27543994057 is a deficient number, since it is larger than the sum of its proper divisors (1197564983).

27543994057 is a wasteful number, since it uses less digits than its factorization.

27543994057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197564982.

The product of its (nonzero) digits is 9525600, while the sum is 55.

The spelling of 27543994057 in words is "twenty-seven billion, five hundred forty-three million, nine hundred ninety-four thousand, fifty-seven".