1103778065 has 8 divisors (see below), whose sum is σ = 1426420968. Its totient is φ = 815097600.

The previous prime is 1103778059. The next prime is 1103778083. The reversal of 1103778065 is 5608773011.

It can be written as a sum of positive squares in 4 ways, for example, as 132894784 + 970883281 = 11528^2 + 31159^2 .

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

It is not a de Polignac number, because 1103778065 - 2¹² = 1103773969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8490536 + ... + 8490665.

It is an arithmetic number, because the mean of its divisors is an integer number (178302621).

Almost surely, 2^1103778065 is an apocalyptic number.

It is an amenable number.

1103778065 is a deficient number, since it is larger than the sum of its proper divisors (322642903).

1103778065 is a wasteful number, since it uses less digits than its factorization.

1103778065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16981219.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 1103778065 is about 33223.1555545225. The cubic root of 1103778065 is about 1033.4605896577.

The spelling of 1103778065 in words is "one billion, one hundred three million, seven hundred seventy-eight thousand, sixty-five".