1155645501 has 8 divisors (see below), whose sum is σ = 1541043744. Its totient is φ = 770338800.

The previous prime is 1155645481. The next prime is 1155645503. The reversal of 1155645501 is 1055465511.

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

It is not a de Polignac number, because 1155645501 - 2¹¹ = 1155643453 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155645503) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16026 + ... + 50676.

It is an arithmetic number, because the mean of its divisors is an integer number (192630468).

Almost surely, 2^1155645501 is an apocalyptic number.

It is an amenable number.

1155645501 is a deficient number, since it is larger than the sum of its proper divisors (385398243).

1155645501 is a wasteful number, since it uses less digits than its factorization.

1155645501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45771.

The product of its (nonzero) digits is 15000, while the sum is 33.

The square root of 1155645501 is about 33994.7863796789. The cubic root of 1155645501 is about 1049.4011705624.

The spelling of 1155645501 in words is "one billion, one hundred fifty-five million, six hundred forty-five thousand, five hundred one".