10823349978 has 48 divisors (see below), whose sum is σ = 27493010880. Its totient is φ = 3091807800.

The previous prime is 10823349967. The next prime is 10823349983. The reversal of 10823349978 is 87994332801.

10823349978 is a `hidden beast` number, since 1 + 0 + 82 + 3 + 3 + 499 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2020003 + ... + 2025353.

It is an arithmetic number, because the mean of its divisors is an integer number (572771060).

Almost surely, 2^10823349978 is an apocalyptic number.

10823349978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

10823349978 is an abundant number, since it is smaller than the sum of its proper divisors (16669660902).

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

10823349978 is an frugal number, since it uses more digits than its factorization.

10823349978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10720 (or 5363 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 10823349978 in words is "ten billion, eight hundred twenty-three million, three hundred forty-nine thousand, nine hundred seventy-eight".