27012721154 has 16 divisors (see below), whose sum is σ = 42655404480. Its totient is φ = 12794377680.

The previous prime is 27012721121. The next prime is 27012721159. The reversal of 27012721154 is 45112721072.

It is a self number, because there is not a number n which added to its sum of digits gives 27012721154.

It is not an unprimeable number, because it can be changed into a prime (27012721159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547532 + ... + 594824.

It is an arithmetic number, because the mean of its divisors is an integer number (2665962780).

Almost surely, 2^27012721154 is an apocalyptic number.

27012721154 is a deficient number, since it is larger than the sum of its proper divisors (15642683326).

27012721154 is a wasteful number, since it uses less digits than its factorization.

27012721154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62345.

The product of its (nonzero) digits is 7840, while the sum is 32.

The spelling of 27012721154 in words is "twenty-seven billion, twelve million, seven hundred twenty-one thousand, one hundred fifty-four".