27400497855 has 32 divisors (see below), whose sum is σ = 45021173760. Its totient is φ = 14225352960.

The previous prime is 27400497821. The next prime is 27400497857. The reversal of 27400497855 is 55879400472.

It is a happy number.

It is not a de Polignac number, because 27400497855 - 2⁷ = 27400497727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27400497798 and 27400497807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27400497857) 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 31 ways as a sum of consecutive naturals, for example, 78702 + ... + 246971.

It is an arithmetic number, because the mean of its divisors is an integer number (1406911680).

Almost surely, 2^27400497855 is an apocalyptic number.

27400497855 is a deficient number, since it is larger than the sum of its proper divisors (17620675905).

27400497855 is a wasteful number, since it uses less digits than its factorization.

27400497855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325831.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 27400497855 in words is "twenty-seven billion, four hundred million, four hundred ninety-seven thousand, eight hundred fifty-five".