155616561655617 has 8 divisors (see below), whose sum is σ = 208394813280640. Its totient is φ = 103291342233840.

The previous prime is 155616561655537. The next prime is 155616561655627. The reversal of 155616561655617 is 716556165616551.

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

It is not a de Polignac number, because 155616561655617 - 2¹⁸ = 155616561393473 is a prime.

It is a super-2 number, since 2×155616561655617² (a number of 29 digits) contains 22 as substring.

It is a Duffinian 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, 113258050009 + ... + 113258051382.

It is an arithmetic number, because the mean of its divisors is an integer number (26049351660080).

Almost surely, 2^{155616561655617} is an apocalyptic number.

It is an amenable number.

155616561655617 is a deficient number, since it is larger than the sum of its proper divisors (52778251625023).

155616561655617 is a wasteful number, since it uses less digits than its factorization.

155616561655617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226516101623.

The product of its digits is 170100000, while the sum is 66.

The spelling of 155616561655617 in words is "one hundred fifty-five trillion, six hundred sixteen billion, five hundred sixty-one million, six hundred fifty-five thousand, six hundred seventeen".