27778726311 has 16 divisors (see below), whose sum is σ = 42544364544. Its totient is φ = 15792979104.

The previous prime is 27778726259. The next prime is 27778726321. The reversal of 27778726311 is 11362787772.

It is not a de Polignac number, because 27778726311 - 2⁶ = 27778726247 is a prime.

It is a super-2 number, since 2×27778726311² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27778726321) 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, 3353215 + ... + 3361488.

It is an arithmetic number, because the mean of its divisors is an integer number (2659022784).

Almost surely, 2^27778726311 is an apocalyptic number.

27778726311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

27778726311 is a deficient number, since it is larger than the sum of its proper divisors (14765638233).

27778726311 is a wasteful number, since it uses less digits than its factorization.

27778726311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6714910.

The product of its digits is 1382976, while the sum is 51.

The spelling of 27778726311 in words is "twenty-seven billion, seven hundred seventy-eight million, seven hundred twenty-six thousand, three hundred eleven".