155220984299 has 2 divisors, whose sum is σ = 155220984300. Its totient is φ = 155220984298.

The previous prime is 155220984221. The next prime is 155220984353. The reversal of 155220984299 is 992489022551.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155220984299 - 2¹² = 155220980203 is a prime.

It is not a weakly prime, because it can be changed into another prime (155220984209) 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, 77610492149 + 77610492150.

It is an arithmetic number, because the mean of its divisors is an integer number (77610492150).

Almost surely, 2^155220984299 is an apocalyptic number.

155220984299 is a deficient number, since it is larger than the sum of its proper divisors (1).

155220984299 is an equidigital number, since it uses as much as digits as its factorization.

155220984299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4665600, while the sum is 56.

The spelling of 155220984299 in words is "one hundred fifty-five billion, two hundred twenty million, nine hundred eighty-four thousand, two hundred ninety-nine".