154320818731 has 2 divisors, whose sum is σ = 154320818732. Its totient is φ = 154320818730.

The previous prime is 154320818683. The next prime is 154320818777. The reversal of 154320818731 is 137818023451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 154320818731 - 2³³ = 145730884139 is a prime.

It is a super-2 number, since 2×154320818731² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (154320810731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77160409365 + 77160409366.

It is an arithmetic number, because the mean of its divisors is an integer number (77160409366).

Almost surely, 2^154320818731 is an apocalyptic number.

154320818731 is a deficient number, since it is larger than the sum of its proper divisors (1).

154320818731 is an equidigital number, since it uses as much as digits as its factorization.

154320818731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 154320818731 in words is "one hundred fifty-four billion, three hundred twenty million, eight hundred eighteen thousand, seven hundred thirty-one".