154233502681 has 2 divisors, whose sum is σ = 154233502682. Its totient is φ = 154233502680.

The previous prime is 154233502637. The next prime is 154233502729. The reversal of 154233502681 is 186205332451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152165527056 + 2067975625 = 390084^2 + 45475^2 .

It is an emirp because it is prime and its reverse (186205332451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154233502681 - 2²¹ = 154231405529 is a prime.

It is a super-2 number, since 2×154233502681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (154233302681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77116751340 + 77116751341.

It is an arithmetic number, because the mean of its divisors is an integer number (77116751341).

Almost surely, 2^154233502681 is an apocalyptic number.

It is an amenable number.

154233502681 is a deficient number, since it is larger than the sum of its proper divisors (1).

154233502681 is an equidigital number, since it uses as much as digits as its factorization.

154233502681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 154233502681 in words is "one hundred fifty-four billion, two hundred thirty-three million, five hundred two thousand, six hundred eighty-one".