445165553 has 16 divisors (see below), whose sum is σ = 545518080. Its totient is φ = 354571776.

The previous prime is 445165547. The next prime is 445165559. The reversal of 445165553 is 355561544.

It is an interprime number because it is at equal distance from previous prime (445165547) and next prime (445165559).

It is a cyclic number.

It is not a de Polignac number, because 445165553 - 2⁶ = 445165489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (445165559) 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, 14276 + ... + 33077.

It is an arithmetic number, because the mean of its divisors is an integer number (34094880).

Almost surely, 2^445165553 is an apocalyptic number.

It is an amenable number.

445165553 is a deficient number, since it is larger than the sum of its proper divisors (100352527).

445165553 is a wasteful number, since it uses less digits than its factorization.

445165553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47456.

The product of its digits is 180000, while the sum is 38.

The square root of 445165553 is about 21098.9467272658. The cubic root of 445165553 is about 763.5553369686. Note that the first 3 decimals are identical.

The spelling of 445165553 in words is "four hundred forty-five million, one hundred sixty-five thousand, five hundred fifty-three".