845399812646004 has 144 divisors (see below), whose sum is σ = 2478025945336704. Its totient is φ = 219579968551680.

The previous prime is 845399812645981. The next prime is 845399812646023. The reversal of 845399812646004 is 400646218993548.

It is a self number, because there is not a number n which added to its sum of digits gives 845399812646004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 522811522 + ... + 524426054.

Almost surely, 2^{845399812646004} is an apocalyptic number.

845399812646004 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

845399812646004 is an abundant number, since it is smaller than the sum of its proper divisors (1632626132690700).

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

845399812646004 is a wasteful number, since it uses less digits than its factorization.

845399812646004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666086 (or 1666073 counting only the distinct ones).

The product of its (nonzero) digits is 358318080, while the sum is 69.

The spelling of 845399812646004 in words is "eight hundred forty-five trillion, three hundred ninety-nine billion, eight hundred twelve million, six hundred forty-six thousand, four".