155551551105 has 16 divisors (see below), whose sum is σ = 249503145984. Its totient is φ = 82753939200.

The previous prime is 155551551061. The next prime is 155551551109. The reversal of 155551551105 is 501155155551.

It is not a de Polignac number, because 155551551105 - 2¹⁵ = 155551518337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155551551109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12924289 + ... + 12936318.

It is an arithmetic number, because the mean of its divisors is an integer number (15593946624).

Almost surely, 2^155551551105 is an apocalyptic number.

155551551105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155551551105 is a deficient number, since it is larger than the sum of its proper divisors (93951594879).

155551551105 is a wasteful number, since it uses less digits than its factorization.

155551551105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25861016.

The product of its (nonzero) digits is 78125, while the sum is 39.

The spelling of 155551551105 in words is "one hundred fifty-five billion, five hundred fifty-one million, five hundred fifty-one thousand, one hundred five".