442457178623 has 16 divisors (see below), whose sum is σ = 460613859552. Its totient is φ = 424694400000.

The previous prime is 442457178601. The next prime is 442457178677. The reversal of 442457178623 is 326871754244.

It is not a de Polignac number, because 442457178623 - 2¹² = 442457174527 is a prime.

It is a super-2 number, since 2×442457178623² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442457178223) 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, 550373 + ... + 1089873.

It is an arithmetic number, because the mean of its divisors is an integer number (28788366222).

Almost surely, 2^442457178623 is an apocalyptic number.

442457178623 is a deficient number, since it is larger than the sum of its proper divisors (18156680929).

442457178623 is a wasteful number, since it uses less digits than its factorization.

442457178623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539866.

The product of its digits is 9031680, while the sum is 53.

The spelling of 442457178623 in words is "four hundred forty-two billion, four hundred fifty-seven million, one hundred seventy-eight thousand, six hundred twenty-three".