1990945153 has 16 divisors (see below), whose sum is σ = 2124763200. Its totient is φ = 1860114240.

The previous prime is 1990945141. The next prime is 1990945163. The reversal of 1990945153 is 3515490991.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1990945153 - 2²⁹ = 1454074241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1990945163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1685223 + ... + 1686403.

It is an arithmetic number, because the mean of its divisors is an integer number (132797700).

Almost surely, 2^1990945153 is an apocalyptic number.

It is an amenable number.

1990945153 is a deficient number, since it is larger than the sum of its proper divisors (133818047).

1990945153 is a wasteful number, since it uses less digits than its factorization.

1990945153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352.

The product of its (nonzero) digits is 218700, while the sum is 46.

The square root of 1990945153 is about 44620.0084379194. The cubic root of 1990945153 is about 1258.0167744534.

The spelling of 1990945153 in words is "one billion, nine hundred ninety million, nine hundred forty-five thousand, one hundred fifty-three".