823003778523 has 8 divisors (see below), whose sum is σ = 1099444589136. Its totient is φ = 547616076800.

The previous prime is 823003778489. The next prime is 823003778533. The reversal of 823003778523 is 325877300328.

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 823003778523 - 2²¹ = 823001681371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (823003778533) 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, 263275398 + ... + 263278523.

It is an arithmetic number, because the mean of its divisors is an integer number (137430573642).

Almost surely, 2^823003778523 is an apocalyptic number.

823003778523 is a deficient number, since it is larger than the sum of its proper divisors (276440810613).

823003778523 is a wasteful number, since it uses less digits than its factorization.

823003778523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526554445.

The product of its (nonzero) digits is 1693440, while the sum is 48.

The spelling of 823003778523 in words is "eight hundred twenty-three billion, three million, seven hundred seventy-eight thousand, five hundred twenty-three".