1115445661 has 8 divisors (see below), whose sum is σ = 1217130624. Its totient is φ = 1013807520.

The previous prime is 1115445629. The next prime is 1115445691. The reversal of 1115445661 is 1665445111.

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

It is not a de Polignac number, because 1115445661 - 2⁵ = 1115445629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115445691) 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, 54345 + ... + 72001.

It is an arithmetic number, because the mean of its divisors is an integer number (152141328).

Almost surely, 2^1115445661 is an apocalyptic number.

1115445661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1115445661 is a deficient number, since it is larger than the sum of its proper divisors (101684963).

1115445661 is a wasteful number, since it uses less digits than its factorization.

1115445661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23411.

The product of its digits is 14400, while the sum is 34.

The square root of 1115445661 is about 33398.2882944620. The cubic root of 1115445661 is about 1037.0892664779.

The spelling of 1115445661 in words is "one billion, one hundred fifteen million, four hundred forty-five thousand, six hundred sixty-one".