1375581111 has 8 divisors (see below), whose sum is σ = 1838594160. Its totient is φ = 914811072.

The previous prime is 1375581107. The next prime is 1375581173. The reversal of 1375581111 is 1111855731.

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

It is not a de Polignac number, because 1375581111 - 2² = 1375581107 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 (1375581211) 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, 559320 + ... + 561773.

It is an arithmetic number, because the mean of its divisors is an integer number (229824270).

Almost surely, 2^1375581111 is an apocalyptic number.

1375581111 is a deficient number, since it is larger than the sum of its proper divisors (463013049).

1375581111 is a wasteful number, since it uses less digits than its factorization.

1375581111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121505.

The product of its digits is 4200, while the sum is 33.

The square root of 1375581111 is about 37088.8273068858. The cubic root of 1375581111 is about 1112.1466752571.

The spelling of 1375581111 in words is "one billion, three hundred seventy-five million, five hundred eighty-one thousand, one hundred eleven".