1155055510155 has 32 divisors (see below), whose sum is σ = 1857943793664. Its totient is φ = 612749627136.

The previous prime is 1155055510153. The next prime is 1155055510181. The reversal of 1155055510155 is 5510155505511.

It is not a de Polignac number, because 1155055510155 - 2¹ = 1155055510153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155055510153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3545199 + ... + 3857271.

It is an arithmetic number, because the mean of its divisors is an integer number (58060743552).

Almost surely, 2^{1155055510155} is an apocalyptic number.

1155055510155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155055510155 is a deficient number, since it is larger than the sum of its proper divisors (702888283509).

1155055510155 is a wasteful number, since it uses less digits than its factorization.

1155055510155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313395.

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

The spelling of 1155055510155 in words is "one trillion, one hundred fifty-five billion, fifty-five million, five hundred ten thousand, one hundred fifty-five".