27431436354 has 64 divisors (see below), whose sum is σ = 64754380800. Its totient is φ = 7584559488.

The previous prime is 27431436281. The next prime is 27431436379. The reversal of 27431436354 is 45363413472.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97617 + ... + 253755.

It is an arithmetic number, because the mean of its divisors is an integer number (1011787200).

Almost surely, 2^27431436354 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27431436354, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32377190400).

27431436354 is an abundant number, since it is smaller than the sum of its proper divisors (37322944446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27431436354 is a wasteful number, since it uses less digits than its factorization.

27431436354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156287.

The product of its digits is 725760, while the sum is 42.

The spelling of 27431436354 in words is "twenty-seven billion, four hundred thirty-one million, four hundred thirty-six thousand, three hundred fifty-four".