442454643506 has 8 divisors (see below), whose sum is σ = 668526359580. Its totient is φ = 219612523648.

The previous prime is 442454643439. The next prime is 442454643569. The reversal of 442454643506 is 605346454244.

It can be written as a sum of positive squares in 2 ways, for example, as 435479888281 + 6974755225 = 659909^2 + 83515^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×442454643506² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 807398711 + ... + 807399258.

Almost surely, 2^442454643506 is an apocalyptic number.

442454643506 is a deficient number, since it is larger than the sum of its proper divisors (226071716074).

442454643506 is a wasteful number, since it uses less digits than its factorization.

442454643506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614798108.

The product of its (nonzero) digits is 5529600, while the sum is 47.

The spelling of 442454643506 in words is "four hundred forty-two billion, four hundred fifty-four million, six hundred forty-three thousand, five hundred six".