27252978477 has 16 divisors (see below), whose sum is σ = 38871447552. Its totient is φ = 16923617280.

The previous prime is 27252978439. The next prime is 27252978503. The reversal of 27252978477 is 77487925272.

It is not a de Polignac number, because 27252978477 - 2⁶ = 27252978413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27252978477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27252978437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2749549 + ... + 2759442.

It is an arithmetic number, because the mean of its divisors is an integer number (2429465472).

Almost surely, 2^27252978477 is an apocalyptic number.

It is an amenable number.

27252978477 is a deficient number, since it is larger than the sum of its proper divisors (11618469075).

27252978477 is a wasteful number, since it uses less digits than its factorization.

27252978477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5509108.

The product of its digits is 27659520, while the sum is 60.

The spelling of 27252978477 in words is "twenty-seven billion, two hundred fifty-two million, nine hundred seventy-eight thousand, four hundred seventy-seven".