155516605106 has 4 divisors (see below), whose sum is σ = 233274907662. Its totient is φ = 77758302552.

The previous prime is 155516605099. The next prime is 155516605109. The reversal of 155516605106 is 601506615551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 601506615551 = 2543 ⋅236534257.

It can be written as a sum of positive squares in only one way, i.e., 153357608881 + 2158996225 = 391609^2 + 46465^2 .

It is not an unprimeable number, because it can be changed into a prime (155516605109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38879151275 + ... + 38879151278.

Almost surely, 2^155516605106 is an apocalyptic number.

155516605106 is a deficient number, since it is larger than the sum of its proper divisors (77758302556).

155516605106 is an equidigital number, since it uses as much as digits as its factorization.

155516605106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77758302555.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 155516605106 in words is "one hundred fifty-five billion, five hundred sixteen million, six hundred five thousand, one hundred six".