1994455156 has 24 divisors (see below), whose sum is σ = 3682542080. Its totient is φ = 942544512.

The previous prime is 1994455139. The next prime is 1994455159. The reversal of 1994455156 is 6515544991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994455159) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2605 + ... + 63211.

Almost surely, 2^1994455156 is an apocalyptic number.

It is an amenable number.

1994455156 is a deficient number, since it is larger than the sum of its proper divisors (1688086924).

1994455156 is a wasteful number, since it uses less digits than its factorization.

1994455156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61063 (or 61061 counting only the distinct ones).

The product of its digits is 972000, while the sum is 49.

The square root of 1994455156 is about 44659.3232819307. The cubic root of 1994455156 is about 1258.7556279376.

The spelling of 1994455156 in words is "one billion, nine hundred ninety-four million, four hundred fifty-five thousand, one hundred fifty-six".