447994136523078 has 48 divisors (see below), whose sum is σ = 1014421774968576. Its totient is φ = 142617939306480.

The previous prime is 447994136523007. The next prime is 447994136523127. The reversal of 447994136523078 is 870325631499744.

447994136523078 is a `hidden beast` number, since 4 + 4 + 7 + 9 + 94 + 1 + 3 + 6 + 523 + 0 + 7 + 8 = 666.

It is a super-2 number, since 2×447994136523078² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 447994136522997 and 447994136523015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 835985188 + ... + 836520903.

It is an arithmetic number, because the mean of its divisors is an integer number (21133786978512).

It is a 2-persistent number, because it is pandigital, and so is 2⋅447994136523078 = 895988273046156, but 3⋅447994136523078 = 1343982409569234 is not.

Almost surely, 2^{447994136523078} is an apocalyptic number.

447994136523078 is an abundant number, since it is smaller than the sum of its proper divisors (566427638445498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

447994136523078 is a wasteful number, since it uses less digits than its factorization.

447994136523078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672506769 (or 1672506766 counting only the distinct ones).

The product of its (nonzero) digits is 1097349120, while the sum is 72.

The spelling of 447994136523078 in words is "four hundred forty-seven trillion, nine hundred ninety-four billion, one hundred thirty-six million, five hundred twenty-three thousand, seventy-eight".