1155005505501 has 8 divisors (see below), whose sum is σ = 1541068688544. Its totient is φ = 769472996400.

The previous prime is 1155005505443. The next prime is 1155005505517. The reversal of 1155005505501 is 1055055005511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1155005505501 - 2¹¹ = 1155005503453 is a prime.

It is a super-2 number, since 2×1155005505501² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155005505701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132663406 + ... + 132672111.

It is an arithmetic number, because the mean of its divisors is an integer number (192633586068).

Almost surely, 2^{1155005505501} is an apocalyptic number.

It is an amenable number.

1155005505501 is a deficient number, since it is larger than the sum of its proper divisors (386063183043).

1155005505501 is a wasteful number, since it uses less digits than its factorization.

1155005505501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265336971.

The product of its (nonzero) digits is 15625, while the sum is 33.

The spelling of 1155005505501 in words is "one trillion, one hundred fifty-five billion, five million, five hundred five thousand, five hundred one".