155616561655647 has 8 divisors (see below), whose sum is σ = 216509998825344. Its totient is φ = 99233749461528.

The previous prime is 155616561655627. The next prime is 155616561655651. The reversal of 155616561655647 is 746556165616551.

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

It is not a de Polignac number, because 155616561655647 - 2⁷ = 155616561655519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (69), and also a Moran number because the ratio is a prime number: 2255312487763 = 155616561655647 / (1 + 5 + 5 + 6 + 1 + 6 + 5 + 6 + 1 + 6 + 5 + 5 + 6 + 4 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155616561655627) 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, 1127656243813 + ... + 1127656243950.

It is an arithmetic number, because the mean of its divisors is an integer number (27063749853168).

Almost surely, 2^{155616561655647} is an apocalyptic number.

155616561655647 is a deficient number, since it is larger than the sum of its proper divisors (60893437169697).

155616561655647 is a wasteful number, since it uses less digits than its factorization.

155616561655647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255312487789.

The product of its digits is 680400000, while the sum is 69.

The spelling of 155616561655647 in words is "one hundred fifty-five trillion, six hundred sixteen billion, five hundred sixty-one million, six hundred fifty-five thousand, six hundred forty-seven".