155421456107 has 2 divisors, whose sum is σ = 155421456108. Its totient is φ = 155421456106.

The previous prime is 155421456097. The next prime is 155421456121. The reversal of 155421456107 is 701654124551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155421456107 - 2¹⁰ = 155421455083 is a prime.

It is not a weakly prime, because it can be changed into another prime (155421456187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77710728053 + 77710728054.

It is an arithmetic number, because the mean of its divisors is an integer number (77710728054).

Almost surely, 2^155421456107 is an apocalyptic number.

155421456107 is a deficient number, since it is larger than the sum of its proper divisors (1).

155421456107 is an equidigital number, since it uses as much as digits as its factorization.

155421456107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168000, while the sum is 41.

The spelling of 155421456107 in words is "one hundred fifty-five billion, four hundred twenty-one million, four hundred fifty-six thousand, one hundred seven".