154438075081 has 2 divisors, whose sum is σ = 154438075082. Its totient is φ = 154438075080.

The previous prime is 154438075031. The next prime is 154438075109. The reversal of 154438075081 is 180570834451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131177249856 + 23260825225 = 362184^2 + 152515^2 .

It is a cyclic number.

It is not a de Polignac number, because 154438075081 - 2³⁵ = 120078336713 is a prime.

It is a super-2 number, since 2×154438075081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (154438075031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77219037540 + 77219037541.

It is an arithmetic number, because the mean of its divisors is an integer number (77219037541).

Almost surely, 2^154438075081 is an apocalyptic number.

It is an amenable number.

154438075081 is a deficient number, since it is larger than the sum of its proper divisors (1).

154438075081 is an equidigital number, since it uses as much as digits as its factorization.

154438075081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 154438075081 in words is "one hundred fifty-four billion, four hundred thirty-eight million, seventy-five thousand, eighty-one".