155664433453 has 4 divisors (see below), whose sum is σ = 155671206048. Its totient is φ = 155657660860.

The previous prime is 155664433417. The next prime is 155664433513. The reversal of 155664433453 is 354334466551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155664433453 - 2²⁵ = 155630879021 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155664433397 and 155664433406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155664433153) 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, 3351703 + ... + 3397828.

It is an arithmetic number, because the mean of its divisors is an integer number (38917801512).

Almost surely, 2^155664433453 is an apocalyptic number.

It is an amenable number.

155664433453 is a deficient number, since it is larger than the sum of its proper divisors (6772595).

155664433453 is an equidigital number, since it uses as much as digits as its factorization.

155664433453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6772594.

The product of its digits is 7776000, while the sum is 49.

The spelling of 155664433453 in words is "one hundred fifty-five billion, six hundred sixty-four million, four hundred thirty-three thousand, four hundred fifty-three".