4491453945 has 32 divisors (see below), whose sum is σ = 7846441344. Its totient is φ = 2175782400.

The previous prime is 4491453929. The next prime is 4491453971. The reversal of 4491453945 is 5493541944.

It is not a de Polignac number, because 4491453945 - 2⁴ = 4491453929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4491453894 and 4491453903.

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, 188925 + ... + 211365.

It is an arithmetic number, because the mean of its divisors is an integer number (245201292).

Almost surely, 2^4491453945 is an apocalyptic number.

It is an amenable number.

4491453945 is a deficient number, since it is larger than the sum of its proper divisors (3354987399).

4491453945 is a wasteful number, since it uses less digits than its factorization.

4491453945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23673.

The product of its digits is 1555200, while the sum is 48.

The square root of 4491453945 is about 67018.3105203347. The cubic root of 4491453945 is about 1649.9178342923.

The spelling of 4491453945 in words is "four billion, four hundred ninety-one million, four hundred fifty-three thousand, nine hundred forty-five".