821568901414 has 16 divisors (see below), whose sum is σ = 1285961810688. Its totient is φ = 392915738952.

The previous prime is 821568901331. The next prime is 821568901427. The reversal of 821568901414 is 414109865128.

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 7 ways as a sum of consecutive naturals, for example, 2295409 + ... + 2629075.

It is an arithmetic number, because the mean of its divisors is an integer number (80372613168).

Almost surely, 2^821568901414 is an apocalyptic number.

821568901414 is a deficient number, since it is larger than the sum of its proper divisors (464392909274).

821568901414 is a wasteful number, since it uses less digits than its factorization.

821568901414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387219.

The product of its (nonzero) digits is 552960, while the sum is 49.

The spelling of 821568901414 in words is "eight hundred twenty-one billion, five hundred sixty-eight million, nine hundred one thousand, four hundred fourteen".