155345324451 has 4 divisors (see below), whose sum is σ = 207127099272. Its totient is φ = 103563549632.

The previous prime is 155345324411. The next prime is 155345324609. The reversal of 155345324451 is 154423543551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154423543551 = 3 ⋅51474514517.

It is a cyclic number.

It is not a de Polignac number, because 155345324451 - 2¹⁸ = 155345062307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155345324411) 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 in 3 ways as a sum of consecutive naturals, for example, 25890887406 + ... + 25890887411.

It is an arithmetic number, because the mean of its divisors is an integer number (51781774818).

Almost surely, 2^155345324451 is an apocalyptic number.

155345324451 is a deficient number, since it is larger than the sum of its proper divisors (51781774821).

155345324451 is an equidigital number, since it uses as much as digits as its factorization.

155345324451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51781774820.

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

The spelling of 155345324451 in words is "one hundred fifty-five billion, three hundred forty-five million, three hundred twenty-four thousand, four hundred fifty-one".