154564681 has 2 divisors, whose sum is σ = 154564682. Its totient is φ = 154564680.

The previous prime is 154564637. The next prime is 154564699. The reversal of 154564681 is 186465451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121110025 + 33454656 = 11005^2 + 5784^2 .

It is a cyclic number.

It is not a de Polignac number, because 154564681 - 2¹¹ = 154562633 is a prime.

It is a super-2 number, since 2×154564681² = 47780481225263522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (154564621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77282340 + 77282341.

It is an arithmetic number, because the mean of its divisors is an integer number (77282341).

Almost surely, 2^154564681 is an apocalyptic number.

It is an amenable number.

154564681 is a deficient number, since it is larger than the sum of its proper divisors (1).

154564681 is an equidigital number, since it uses as much as digits as its factorization.

154564681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115200, while the sum is 40.

The square root of 154564681 is about 12432.4044737935. The cubic root of 154564681 is about 536.6651829664.

The spelling of 154564681 in words is "one hundred fifty-four million, five hundred sixty-four thousand, six hundred eighty-one".