27860365313 has 18 divisors (see below), whose sum is σ = 32012790642. Its totient is φ = 24226348960.

The previous prime is 27860365297. The next prime is 27860365367. The reversal of 27860365313 is 31356306872.

It can be written as a sum of positive squares in only one way, i.e., 14079483649 + 13780881664 = 118657^2 + 117392^2 .

It is not a de Polignac number, because 27860365313 - 2⁴ = 27860365297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27860365373) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 153620 + ... + 281637.

It is an arithmetic number, because the mean of its divisors is an integer number (1778488369).

Almost surely, 2^27860365313 is an apocalyptic number.

27860365313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

27860365313 is a deficient number, since it is larger than the sum of its proper divisors (4152425329).

27860365313 is a wasteful number, since it uses less digits than its factorization.

27860365313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435325 (or 435291 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 27860365313 in words is "twenty-seven billion, eight hundred sixty million, three hundred sixty-five thousand, three hundred thirteen".