1945809696 has 24 divisors (see below), whose sum is σ = 5107750704. Its totient is φ = 648603200.

The previous prime is 1945809689. The next prime is 1945809731. The reversal of 1945809696 is 6969085491.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1945809696² = 7572350746095224832, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10134330 + ... + 10134521.

It is an arithmetic number, because the mean of its divisors is an integer number (212822946).

Almost surely, 2^1945809696 is an apocalyptic number.

1945809696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1945809696 is an abundant number, since it is smaller than the sum of its proper divisors (3161941008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1945809696 is a wasteful number, since it uses less digits than its factorization.

1945809696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20268864 (or 20268856 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 57.

The square root of 1945809696 is about 44111.3329655770. The cubic root of 1945809696 is about 1248.4374493757.

The spelling of 1945809696 in words is "one billion, nine hundred forty-five million, eight hundred nine thousand, six hundred ninety-six".