27464378813 has 4 divisors (see below), whose sum is σ = 27524476380. Its totient is φ = 27404281248.

The previous prime is 27464378807. The next prime is 27464378819. The reversal of 27464378813 is 31887346472.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (27464378807) and next prime (27464378819).

It can be written as a sum of positive squares in 2 ways, for example, as 23839977604 + 3624401209 = 154402^2 + 60203^2 .

It is a cyclic number.

It is not a de Polignac number, because 27464378813 - 2⁴ = 27464378797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27464378819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30048098 + ... + 30049011.

It is an arithmetic number, because the mean of its divisors is an integer number (6881119095).

Almost surely, 2^27464378813 is an apocalyptic number.

It is an amenable number.

27464378813 is a deficient number, since it is larger than the sum of its proper divisors (60097567).

27464378813 is an equidigital number, since it uses as much as digits as its factorization.

27464378813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60097566.

The product of its digits is 5419008, while the sum is 53.

The spelling of 27464378813 in words is "twenty-seven billion, four hundred sixty-four million, three hundred seventy-eight thousand, eight hundred thirteen".