154593043691 has 2 divisors, whose sum is σ = 154593043692. Its totient is φ = 154593043690.

The previous prime is 154593043643. The next prime is 154593043697. The reversal of 154593043691 is 196340395451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 154593043691 - 2¹⁴ = 154593027307 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (154593043697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77296521845 + 77296521846.

It is an arithmetic number, because the mean of its divisors is an integer number (77296521846).

Almost surely, 2^154593043691 is an apocalyptic number.

154593043691 is a deficient number, since it is larger than the sum of its proper divisors (1).

154593043691 is an equidigital number, since it uses as much as digits as its factorization.

154593043691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1749600, while the sum is 50.

The spelling of 154593043691 in words is "one hundred fifty-four billion, five hundred ninety-three million, forty-three thousand, six hundred ninety-one".