155473427247205 has 4 divisors (see below), whose sum is σ = 186568112696652. Its totient is φ = 124378741797760.

The previous prime is 155473427247181. The next prime is 155473427247233. The reversal of 155473427247205 is 502742724374551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58050486713569 + 97422940533636 = 7619087^2 + 9870306^2 .

It is not a de Polignac number, because 155473427247205 - 2⁷ = 155473427247077 is a prime.

It is a super-2 number, since 2×155473427247205² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155473427247205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15547342724716 + ... + 15547342724725.

It is an arithmetic number, because the mean of its divisors is an integer number (46642028174163).

Almost surely, 2^{155473427247205} is an apocalyptic number.

It is an amenable number.

155473427247205 is a deficient number, since it is larger than the sum of its proper divisors (31094685449447).

155473427247205 is an equidigital number, since it uses as much as digits as its factorization.

155473427247205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31094685449446.

The product of its (nonzero) digits is 65856000, while the sum is 58.

The spelling of 155473427247205 in words is "one hundred fifty-five trillion, four hundred seventy-three billion, four hundred twenty-seven million, two hundred forty-seven thousand, two hundred five".