154996221811 has 2 divisors, whose sum is σ = 154996221812. Its totient is φ = 154996221810.

The previous prime is 154996221781. The next prime is 154996221827. The reversal of 154996221811 is 118122699451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 154996221811 - 2²⁷ = 154862004083 is a prime.

It is not a weakly prime, because it can be changed into another prime (154996221871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77498110905 + 77498110906.

It is an arithmetic number, because the mean of its divisors is an integer number (77498110906).

Almost surely, 2^154996221811 is an apocalyptic number.

154996221811 is a deficient number, since it is larger than the sum of its proper divisors (1).

154996221811 is an equidigital number, since it uses as much as digits as its factorization.

154996221811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 49.

The spelling of 154996221811 in words is "one hundred fifty-four billion, nine hundred ninety-six million, two hundred twenty-one thousand, eight hundred eleven".