13278227585 has 16 divisors (see below), whose sum is σ = 18212777472. Its totient is φ = 9103752000.

The previous prime is 13278227581. The next prime is 13278227591. The reversal of 13278227585 is 58572287231.

It is not a de Polignac number, because 13278227585 - 2² = 13278227581 is a prime.

It is a super-2 number, since 2×13278227585² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13278227581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260120 + ... + 306950.

It is an arithmetic number, because the mean of its divisors is an integer number (1138298592).

Almost surely, 2^13278227585 is an apocalyptic number.

It is an amenable number.

13278227585 is a deficient number, since it is larger than the sum of its proper divisors (4934549887).

13278227585 is an equidigital number, since it uses as much as digits as its factorization.

13278227585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54944.

The product of its digits is 1881600, while the sum is 50.

The spelling of 13278227585 in words is "thirteen billion, two hundred seventy-eight million, two hundred twenty-seven thousand, five hundred eighty-five".