155161555 has 8 divisors (see below), whose sum is σ = 186570000. Its totient is φ = 123878496.

The previous prime is 155161549. The next prime is 155161577. The reversal of 155161555 is 555161551.

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 155161555 - 2⁹ = 155161043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155161555.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28600 + ... + 33589.

It is an arithmetic number, because the mean of its divisors is an integer number (23321250).

Almost surely, 2^155161555 is an apocalyptic number.

155161555 is a deficient number, since it is larger than the sum of its proper divisors (31408445).

155161555 is an equidigital number, since it uses as much as digits as its factorization.

155161555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62693.

The product of its digits is 18750, while the sum is 34.

The square root of 155161555 is about 12456.3861131550. The cubic root of 155161555 is about 537.3550992137.

It can be divided in two parts, 15516 and 1555, that added together give a palindrome (17071).

The spelling of 155161555 in words is "one hundred fifty-five million, one hundred sixty-one thousand, five hundred fifty-five".