27458557445557 has 16 divisors (see below), whose sum is σ = 31660524450432. Its totient is φ = 23326440560640.

The previous prime is 27458557445533. The next prime is 27458557445581. The reversal of 27458557445557 is 75554475585472.

It is an interprime number because it is at equal distance from previous prime (27458557445533) and next prime (27458557445581).

It is not a de Polignac number, because 27458557445557 - 2¹⁹ = 27458556921269 is a prime.

It is a super-2 number, since 2×27458557445557² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27458557445557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27458557445357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14899582 + ... + 16640752.

It is an arithmetic number, because the mean of its divisors is an integer number (1978782778152).

Almost surely, 2^{27458557445557} is an apocalyptic number.

It is an amenable number.

27458557445557 is a deficient number, since it is larger than the sum of its proper divisors (4201967004875).

27458557445557 is a wasteful number, since it uses less digits than its factorization.

27458557445557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761228.

The product of its digits is 5488000000, while the sum is 73.

The spelling of 27458557445557 in words is "twenty-seven trillion, four hundred fifty-eight billion, five hundred fifty-seven million, four hundred forty-five thousand, five hundred fifty-seven".