155232816653 has 4 divisors (see below), whose sum is σ = 157777616988. Its totient is φ = 152688016320.

The previous prime is 155232816643. The next prime is 155232816659. The reversal of 155232816653 is 356618232551.

It is a happy number.

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 6161151049 + 149071665604 = 78493^2 + 386098^2 .

It is a cyclic number.

It is not a de Polignac number, because 155232816653 - 2²⁰ = 155231768077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155232816598 and 155232816607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155232816659) 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, 1272400076 + ... + 1272400197.

It is an arithmetic number, because the mean of its divisors is an integer number (39444404247).

Almost surely, 2^155232816653 is an apocalyptic number.

It is an amenable number.

155232816653 is a deficient number, since it is larger than the sum of its proper divisors (2544800335).

155232816653 is an equidigital number, since it uses as much as digits as its factorization.

155232816653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544800334.

The product of its digits is 1296000, while the sum is 47.

The spelling of 155232816653 in words is "one hundred fifty-five billion, two hundred thirty-two million, eight hundred sixteen thousand, six hundred fifty-three".