1165551550499 has 8 divisors (see below), whose sum is σ = 1332132480000. Its totient is φ = 998989012296.

The previous prime is 1165551550489. The next prime is 1165551550507. The reversal of 1165551550499 is 9940551555611.

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

It is a cyclic number.

It is not a de Polignac number, because 1165551550499 - 2¹⁶ = 1165551484963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1165551550409) 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, 4461749 + ... + 4715750.

It is an arithmetic number, because the mean of its divisors is an integer number (166516560000).

Almost surely, 2^{1165551550499} is an apocalyptic number.

1165551550499 is a deficient number, since it is larger than the sum of its proper divisors (166580929501).

1165551550499 is an equidigital number, since it uses as much as digits as its factorization.

1165551550499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9195649.

The product of its (nonzero) digits is 6075000, while the sum is 56.

The spelling of 1165551550499 in words is "one trillion, one hundred sixty-five billion, five hundred fifty-one million, five hundred fifty thousand, four hundred ninety-nine".