155616122045 has 4 divisors (see below), whose sum is σ = 186739346460. Its totient is φ = 124492897632.

The previous prime is 155616122041. The next prime is 155616122059. The reversal of 155616122045 is 540221616551.

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 49165966756 + 106450155289 = 221734^2 + 326267^2 .

It is a cyclic number.

It is not a de Polignac number, because 155616122045 - 2² = 155616122041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155616122041) 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, 15561612200 + ... + 15561612209.

It is an arithmetic number, because the mean of its divisors is an integer number (46684836615).

Almost surely, 2^155616122045 is an apocalyptic number.

It is an amenable number.

155616122045 is a deficient number, since it is larger than the sum of its proper divisors (31123224415).

155616122045 is an equidigital number, since it uses as much as digits as its factorization.

155616122045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31123224414.

The product of its (nonzero) digits is 72000, while the sum is 38.

Adding to 155616122045 its reverse (540221616551), we get a palindrome (695837738596).

The spelling of 155616122045 in words is "one hundred fifty-five billion, six hundred sixteen million, one hundred twenty-two thousand, forty-five".