155660561243 has 8 divisors (see below), whose sum is σ = 169848198000. Its totient is φ = 141479037280.

The previous prime is 155660561239. The next prime is 155660561311. The reversal of 155660561243 is 342165066551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155660561243 - 2² = 155660561239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155660561194 and 155660561203.

It is not an unprimeable number, because it can be changed into a prime (155660561233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1474868 + ... + 1576881.

It is an arithmetic number, because the mean of its divisors is an integer number (21231024750).

Almost surely, 2^155660561243 is an apocalyptic number.

155660561243 is a deficient number, since it is larger than the sum of its proper divisors (14187636757).

155660561243 is a wasteful number, since it uses less digits than its factorization.

155660561243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3056397.

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 155660561243 in words is "one hundred fifty-five billion, six hundred sixty million, five hundred sixty-one thousand, two hundred forty-three".