154860828821 has 2 divisors, whose sum is σ = 154860828822. Its totient is φ = 154860828820.

The previous prime is 154860828779. The next prime is 154860828839. The reversal of 154860828821 is 128828068451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109041285796 + 45819543025 = 330214^2 + 214055^2 .

It is a cyclic number.

It is not a de Polignac number, because 154860828821 - 2²⁶ = 154793719957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154860828121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77430414410 + 77430414411.

It is an arithmetic number, because the mean of its divisors is an integer number (77430414411).

Almost surely, 2^154860828821 is an apocalyptic number.

It is an amenable number.

154860828821 is a deficient number, since it is larger than the sum of its proper divisors (1).

154860828821 is an equidigital number, since it uses as much as digits as its factorization.

154860828821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1966080, while the sum is 53.

The spelling of 154860828821 in words is "one hundred fifty-four billion, eight hundred sixty million, eight hundred twenty-eight thousand, eight hundred twenty-one".