819944464537 has 8 divisors (see below), whose sum is σ = 925329176640. Its totient is φ = 719700470160.

The previous prime is 819944464489. The next prime is 819944464541. The reversal of 819944464537 is 735464449918.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-819944464537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (819944464037) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1285179093 + ... + 1285179730.

It is an arithmetic number, because the mean of its divisors is an integer number (115666147080).

Almost surely, 2^819944464537 is an apocalyptic number.

It is an amenable number.

819944464537 is a deficient number, since it is larger than the sum of its proper divisors (105384712103).

819944464537 is a wasteful number, since it uses less digits than its factorization.

819944464537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570358863.

The product of its digits is 104509440, while the sum is 64.

The spelling of 819944464537 in words is "eight hundred nineteen billion, nine hundred forty-four million, four hundred sixty-four thousand, five hundred thirty-seven".