6446381142 has 16 divisors (see below), whose sum is σ = 13571328960. Its totient is φ = 2035699272.

The previous prime is 6446381141. The next prime is 6446381153. The reversal of 6446381142 is 2411836446.

It is a self number, because there is not a number n which added to its sum of digits gives 6446381142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446381141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28273488 + ... + 28273715.

It is an arithmetic number, because the mean of its divisors is an integer number (848208060).

Almost surely, 2^6446381142 is an apocalyptic number.

6446381142 is an abundant number, since it is smaller than the sum of its proper divisors (7124947818).

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

6446381142 is a wasteful number, since it uses less digits than its factorization.

6446381142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56547227.

The product of its digits is 110592, while the sum is 39.

The square root of 6446381142 is about 80289.3588341568. The cubic root of 6446381142 is about 1861.1097880430.

The spelling of 6446381142 in words is "six billion, four hundred forty-six million, three hundred eighty-one thousand, one hundred forty-two".