1099778995 has 32 divisors (see below), whose sum is σ = 1610081280. Its totient is φ = 704350080.

The previous prime is 1099778969. The next prime is 1099779013. The reversal of 1099778995 is 5998779901.

It is a de Polignac number, because none of the positive numbers 2^k-1099778995 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35569 + ... + 58861.

It is an arithmetic number, because the mean of its divisors is an integer number (50315040).

Almost surely, 2^1099778995 is an apocalyptic number.

1099778995 is a deficient number, since it is larger than the sum of its proper divisors (510302285).

1099778995 is a wasteful number, since it uses less digits than its factorization.

1099778995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23395.

The product of its (nonzero) digits is 12859560, while the sum is 64.

The square root of 1099778995 is about 33162.9159604520. The cubic root of 1099778995 is about 1032.2109777753.

The spelling of 1099778995 in words is "one billion, ninety-nine million, seven hundred seventy-eight thousand, nine hundred ninety-five".