1181441657 has 8 divisors (see below), whose sum is σ = 1292563872. Its totient is φ = 1070939200.

The previous prime is 1181441647. The next prime is 1181441659. The reversal of 1181441657 is 7561441811.

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 1181441657 - 2¹² = 1181437561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1181441657.

It is not an unprimeable number, because it can be changed into a prime (1181441659) 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, 150944 + ... + 158577.

It is an arithmetic number, because the mean of its divisors is an integer number (161570484).

Almost surely, 2^1181441657 is an apocalyptic number.

It is an amenable number.

1181441657 is a deficient number, since it is larger than the sum of its proper divisors (111122215).

1181441657 is a wasteful number, since it uses less digits than its factorization.

1181441657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309879.

The product of its digits is 26880, while the sum is 38.

The square root of 1181441657 is about 34372.1057981614. The cubic root of 1181441657 is about 1057.1519776866.

The spelling of 1181441657 in words is "one billion, one hundred eighty-one million, four hundred forty-one thousand, six hundred fifty-seven".