155543421345 has 32 divisors (see below), whose sum is σ = 270518113152. Its totient is φ = 75859556352.

The previous prime is 155543421301. The next prime is 155543421377. The reversal of 155543421345 is 543124345551.

It is not a de Polignac number, because 155543421345 - 2⁹ = 155543420833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155543421297 and 155543421306.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3706512 + ... + 3748241.

It is an arithmetic number, because the mean of its divisors is an integer number (8453691036).

Almost surely, 2^155543421345 is an apocalyptic number.

155543421345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155543421345 is a deficient number, since it is larger than the sum of its proper divisors (114974691807).

155543421345 is a wasteful number, since it uses less digits than its factorization.

155543421345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7454881.

The product of its digits is 720000, while the sum is 42.

Adding to 155543421345 its reverse (543124345551), we get a palindrome (698667766896).

The spelling of 155543421345 in words is "one hundred fifty-five billion, five hundred forty-three million, four hundred twenty-one thousand, three hundred forty-five".