1078491815 has 16 divisors (see below), whose sum is σ = 1402191648. Its totient is φ = 793153536.

The previous prime is 1078491803. The next prime is 1078491823. The reversal of 1078491815 is 5181948701.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1078491815 - 2⁸ = 1078491559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143882 + ... + 151191.

It is an arithmetic number, because the mean of its divisors is an integer number (87636978).

Almost surely, 2^1078491815 is an apocalyptic number.

1078491815 is a deficient number, since it is larger than the sum of its proper divisors (323699833).

1078491815 is a wasteful number, since it uses less digits than its factorization.

1078491815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295138.

The product of its (nonzero) digits is 80640, while the sum is 44.

The square root of 1078491815 is about 32840.3991297304. The cubic root of 1078491815 is about 1025.5077603239.

The spelling of 1078491815 in words is "one billion, seventy-eight million, four hundred ninety-one thousand, eight hundred fifteen".