1155511650161 has 8 divisors (see below), whose sum is σ = 1264298696544. Its totient is φ = 1047348025920.

The previous prime is 1155511650133. The next prime is 1155511650187. The reversal of 1155511650161 is 1610561155511.

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 1155511650161 - 2²⁶ = 1155444541297 is a prime.

It is a super-3 number, since 3×1155511650161³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155511650131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155851655 + ... + 155859068.

It is an arithmetic number, because the mean of its divisors is an integer number (158037337068).

Almost surely, 2^{1155511650161} is an apocalyptic number.

1155511650161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1155511650161 is a deficient number, since it is larger than the sum of its proper divisors (108787046383).

1155511650161 is a wasteful number, since it uses less digits than its factorization.

1155511650161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311711071.

The product of its (nonzero) digits is 22500, while the sum is 38.

The spelling of 1155511650161 in words is "one trillion, one hundred fifty-five billion, five hundred eleven million, six hundred fifty thousand, one hundred sixty-one".