1994495564 has 6 divisors (see below), whose sum is σ = 3490367244. Its totient is φ = 997247780.

The previous prime is 1994495551. The next prime is 1994495579. The reversal of 1994495564 is 4655944991.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249311942 + ... + 249311949.

It is an arithmetic number, because the mean of its divisors is an integer number (581727874).

Almost surely, 2^1994495564 is an apocalyptic number.

It is an amenable number.

1994495564 is a deficient number, since it is larger than the sum of its proper divisors (1495871680).

1994495564 is a wasteful number, since it uses less digits than its factorization.

1994495564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498623895 (or 498623893 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 56.

The square root of 1994495564 is about 44659.7756823744. The cubic root of 1994495564 is about 1258.7641287477.

The spelling of 1994495564 in words is "one billion, nine hundred ninety-four million, four hundred ninety-five thousand, five hundred sixty-four".