1447813778042 has 4 divisors (see below), whose sum is σ = 2171720667066. Its totient is φ = 723906889020.

The previous prime is 1447813778017. The next prime is 1447813778077. The reversal of 1447813778042 is 2408773187441.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 756306776281 + 691507001761 = 869659^2 + 831569^2 .

It is a super-3 number, since 3×1447813778042³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361953444509 + ... + 361953444512.

Almost surely, 2^{1447813778042} is an apocalyptic number.

1447813778042 is a deficient number, since it is larger than the sum of its proper divisors (723906889024).

1447813778042 is an equidigital number, since it uses as much as digits as its factorization.

1447813778042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723906889023.

The product of its (nonzero) digits is 8429568, while the sum is 56.

The spelling of 1447813778042 in words is "one trillion, four hundred forty-seven billion, eight hundred thirteen million, seven hundred seventy-eight thousand, forty-two".