27451355801 has 4 divisors (see below), whose sum is σ = 27451694004. Its totient is φ = 27451017600.

The previous prime is 27451355797. The next prime is 27451355831. The reversal of 27451355801 is 10855315472.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12081307225 + 15370048576 = 109915^2 + 123976^2 .

It is a cyclic number.

It is not a de Polignac number, because 27451355801 - 2² = 27451355797 is a prime.

It is a deceptive number, since it divides R_27451355800.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27451355831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33821 + ... + 236741.

It is an arithmetic number, because the mean of its divisors is an integer number (6862923501).

Almost surely, 2^27451355801 is an apocalyptic number.

27451355801 is the 135281-st pentagonal number.

It is an amenable number.

27451355801 is a deficient number, since it is larger than the sum of its proper divisors (338203).

27451355801 is a wasteful number, since it uses less digits than its factorization.

27451355801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338202.

The product of its (nonzero) digits is 168000, while the sum is 41.

The spelling of 27451355801 in words is "twenty-seven billion, four hundred fifty-one million, three hundred fifty-five thousand, eight hundred one".