1155949731799 has 8 divisors (see below), whose sum is σ = 1235175646320. Its totient is φ = 1077971469696.

The previous prime is 1155949731707. The next prime is 1155949731817. The reversal of 1155949731799 is 9971379495511.

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 1155949731799 - 2¹⁵ = 1155949699031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155949731499) 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, 311911189 + ... + 311914894.

It is an arithmetic number, because the mean of its divisors is an integer number (154396955790).

Almost surely, 2^{1155949731799} is an apocalyptic number.

1155949731799 is a deficient number, since it is larger than the sum of its proper divisors (79225914521).

1155949731799 is a wasteful number, since it uses less digits than its factorization.

1155949731799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623826209.

The product of its digits is 96446700, while the sum is 70.

The spelling of 1155949731799 in words is "one trillion, one hundred fifty-five billion, nine hundred forty-nine million, seven hundred thirty-one thousand, seven hundred ninety-nine".