27657121145 has 8 divisors (see below), whose sum is σ = 34935311040. Its totient is φ = 20961186480.

The previous prime is 27657121133. The next prime is 27657121229. The reversal of 27657121145 is 54112175672.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-27657121145 is a prime.

It is a super-2 number, since 2×27657121145² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145563701 + ... + 145563890.

It is an arithmetic number, because the mean of its divisors is an integer number (4366913880).

Almost surely, 2^27657121145 is an apocalyptic number.

It is an amenable number.

27657121145 is a deficient number, since it is larger than the sum of its proper divisors (7278189895).

27657121145 is a wasteful number, since it uses less digits than its factorization.

27657121145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291127615.

The product of its digits is 117600, while the sum is 41.

The spelling of 27657121145 in words is "twenty-seven billion, six hundred fifty-seven million, one hundred twenty-one thousand, one hundred forty-five".