27420436806 has 64 divisors (see below), whose sum is σ = 63886158336. Its totient is φ = 7684243200.

The previous prime is 27420436751. The next prime is 27420436831. The reversal of 27420436806 is 60863402472.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 530241 + ... + 579651.

It is an arithmetic number, because the mean of its divisors is an integer number (998221224).

Almost surely, 2^27420436806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27420436806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31943079168).

27420436806 is an abundant number, since it is smaller than the sum of its proper divisors (36465721530).

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

27420436806 is a wasteful number, since it uses less digits than its factorization.

27420436806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49677.

The product of its (nonzero) digits is 387072, while the sum is 42.

The spelling of 27420436806 in words is "twenty-seven billion, four hundred twenty million, four hundred thirty-six thousand, eight hundred six".