154548770021 has 2 divisors, whose sum is σ = 154548770022. Its totient is φ = 154548770020.

The previous prime is 154548769987. The next prime is 154548770039. The reversal of 154548770021 is 120077845451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85826147521 + 68722622500 = 292961^2 + 262150^2 .

It is a cyclic number.

It is not a de Polignac number, because 154548770021 - 2⁶ = 154548769957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154548700021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77274385010 + 77274385011.

It is an arithmetic number, because the mean of its divisors is an integer number (77274385011).

Almost surely, 2^154548770021 is an apocalyptic number.

It is an amenable number.

154548770021 is a deficient number, since it is larger than the sum of its proper divisors (1).

154548770021 is an equidigital number, since it uses as much as digits as its factorization.

154548770021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 313600, while the sum is 44.

The spelling of 154548770021 in words is "one hundred fifty-four billion, five hundred forty-eight million, seven hundred seventy thousand, twenty-one".