27154156157 has 4 divisors (see below), whose sum is σ = 27666498780. Its totient is φ = 26641813536.

The previous prime is 27154156153. The next prime is 27154156207. The reversal of 27154156157 is 75165145172.

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 22115853796 + 5038302361 = 148714^2 + 70981^2 .

It is a cyclic number.

It is not a de Polignac number, because 27154156157 - 2² = 27154156153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27154156153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256171232 + ... + 256171337.

It is an arithmetic number, because the mean of its divisors is an integer number (6916624695).

Almost surely, 2^27154156157 is an apocalyptic number.

It is an amenable number.

27154156157 is a deficient number, since it is larger than the sum of its proper divisors (512342623).

27154156157 is an equidigital number, since it uses as much as digits as its factorization.

27154156157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512342622.

The product of its digits is 294000, while the sum is 44.

The spelling of 27154156157 in words is "twenty-seven billion, one hundred fifty-four million, one hundred fifty-six thousand, one hundred fifty-seven".