819140645 has 8 divisors (see below), whose sum is σ = 983241504. Its totient is φ = 655130704.

The previous prime is 819140629. The next prime is 819140657. The reversal of 819140645 is 546041918.

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 819140645 - 2⁴ = 819140629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 819140599 and 819140608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1019 + ... + 40488.

It is an arithmetic number, because the mean of its divisors is an integer number (122905188).

Almost surely, 2^819140645 is an apocalyptic number.

It is an amenable number.

819140645 is a deficient number, since it is larger than the sum of its proper divisors (164100859).

819140645 is a wasteful number, since it uses less digits than its factorization.

819140645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45459.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 819140645 is about 28620.6332040366. The cubic root of 819140645 is about 935.6630773655.

The spelling of 819140645 in words is "eight hundred nineteen million, one hundred forty thousand, six hundred forty-five".