27770151481 has 2 divisors, whose sum is σ = 27770151482. Its totient is φ = 27770151480.

The previous prime is 27770151449. The next prime is 27770151547. The reversal of 27770151481 is 18415107772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24683237881 + 3086913600 = 157109^2 + 55560^2 .

It is a cyclic number.

It is not a de Polignac number, because 27770151481 - 2⁵ = 27770151449 is a prime.

It is a super-2 number, since 2×27770151481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27770151281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13885075740 + 13885075741.

It is an arithmetic number, because the mean of its divisors is an integer number (13885075741).

Almost surely, 2^27770151481 is an apocalyptic number.

It is an amenable number.

27770151481 is a deficient number, since it is larger than the sum of its proper divisors (1).

27770151481 is an equidigital number, since it uses as much as digits as its factorization.

27770151481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109760, while the sum is 43.

The spelling of 27770151481 in words is "twenty-seven billion, seven hundred seventy million, one hundred fifty-one thousand, four hundred eighty-one".