1421857990368 has 72 divisors (see below), whose sum is σ = 4256219658600. Its totient is φ = 449007784704.

The previous prime is 1421857990337. The next prime is 1421857990393. The reversal of 1421857990368 is 8630997581241.

1421857990368 is a `hidden beast` number, since 1 + 4 + 2 + 185 + 7 + 9 + 90 + 368 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129915763 + ... + 129926706.

It is an arithmetic number, because the mean of its divisors is an integer number (59114161925).

It is a 2-persistent number, because it is pandigital, and so is 2⋅1421857990368 = 2843715980736, but 3⋅1421857990368 = 4265573971104 is not.

Almost surely, 2^{1421857990368} is an apocalyptic number.

1421857990368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1421857990368 is an abundant number, since it is smaller than the sum of its proper divisors (2834361668232).

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

1421857990368 is a wasteful number, since it uses less digits than its factorization.

1421857990368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259842504 (or 259842493 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 1421857990368 in words is "one trillion, four hundred twenty-one billion, eight hundred fifty-seven million, nine hundred ninety thousand, three hundred sixty-eight".