1155038031811 has 8 divisors (see below), whose sum is σ = 1213842609584. Its totient is φ = 1097685419040.

The previous prime is 1155038031809. The next prime is 1155038031841. The reversal of 1155038031811 is 1181308305511.

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 1155038031811 - 2¹ = 1155038031809 is a prime.

It is a super-2 number, since 2×1155038031811² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155038031841) 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, 362989620 + ... + 362992801.

It is an arithmetic number, because the mean of its divisors is an integer number (151730326198).

Almost surely, 2^{1155038031811} is an apocalyptic number.

1155038031811 is a deficient number, since it is larger than the sum of its proper divisors (58804577773).

1155038031811 is an equidigital number, since it uses as much as digits as its factorization.

1155038031811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725982501.

The product of its (nonzero) digits is 14400, while the sum is 37.

The spelling of 1155038031811 in words is "one trillion, one hundred fifty-five billion, thirty-eight million, thirty-one thousand, eight hundred eleven".