155423144203553 has 4 divisors (see below), whose sum is σ = 155431798553280. Its totient is φ = 155414489853828.

The previous prime is 155423144203517. The next prime is 155423144203609. The reversal of 155423144203553 is 355302441324551.

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 a de Polignac number, because none of the positive numbers 2^k-155423144203553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155423144203498 and 155423144203507.

It is not an unprimeable number, because it can be changed into a prime (155423144203753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4327147925 + ... + 4327183842.

It is an arithmetic number, because the mean of its divisors is an integer number (38857949638320).

Almost surely, 2^{155423144203553} is an apocalyptic number.

It is an amenable number.

155423144203553 is a deficient number, since it is larger than the sum of its proper divisors (8654349727).

155423144203553 is an equidigital number, since it uses as much as digits as its factorization.

155423144203553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8654349726.

The product of its (nonzero) digits is 4320000, while the sum is 47.

The spelling of 155423144203553 in words is "one hundred fifty-five trillion, four hundred twenty-three billion, one hundred forty-four million, two hundred three thousand, five hundred fifty-three".