155005502505 has 32 divisors (see below), whose sum is σ = 289469251584. Its totient is φ = 69352003776.

The previous prime is 155005502467. The next prime is 155005502527. The reversal of 155005502505 is 505205500551.

It is not a de Polignac number, because 155005502505 - 2¹¹ = 155005500457 is a prime.

It is a super-2 number, since 2×155005502505² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15699777 + ... + 15709646.

It is an arithmetic number, because the mean of its divisors is an integer number (9045914112).

Almost surely, 2^155005502505 is an apocalyptic number.

155005502505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155005502505 is a deficient number, since it is larger than the sum of its proper divisors (134463749079).

155005502505 is a wasteful number, since it uses less digits than its factorization.

155005502505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31409485.

The product of its (nonzero) digits is 31250, while the sum is 33.

The spelling of 155005502505 in words is "one hundred fifty-five billion, five million, five hundred two thousand, five hundred five".