819643913629 has 8 divisors (see below), whose sum is σ = 824652077760. Its totient is φ = 814636941696.

The previous prime is 819643913579. The next prime is 819643913639. The reversal of 819643913629 is 926319346918.

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

It is a cyclic number.

It is not a de Polignac number, because 819643913629 - 2⁹ = 819643913117 is a prime.

It is a super-2 number, since 2×819643913629² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819643913639) 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, 1101162 + ... + 1688740.

It is an arithmetic number, because the mean of its divisors is an integer number (103081509720).

Almost surely, 2^819643913629 is an apocalyptic number.

It is an amenable number.

819643913629 is a deficient number, since it is larger than the sum of its proper divisors (5008164131).

819643913629 is a wasteful number, since it uses less digits than its factorization.

819643913629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596099.

The product of its digits is 15116544, while the sum is 61.

The spelling of 819643913629 in words is "eight hundred nineteen billion, six hundred forty-three million, nine hundred thirteen thousand, six hundred twenty-nine".