823978524052 has 24 divisors (see below), whose sum is σ = 1477177935912. Its totient is φ = 401928307200.

The previous prime is 823978524029. The next prime is 823978524097. The reversal of 823978524052 is 250425879328.

It can be written as a sum of positive squares in 4 ways, for example, as 50482899856 + 773495624196 = 224684^2 + 879486^2 .

It is a junction number, because it is equal to n+sod(n) for n = 823978523984 and 823978524002.

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, 7461802 + ... + 7571422.

It is an arithmetic number, because the mean of its divisors is an integer number (61549080663).

Almost surely, 2^823978524052 is an apocalyptic number.

823978524052 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

823978524052 is a deficient number, since it is larger than the sum of its proper divisors (653199411860).

823978524052 is a wasteful number, since it uses less digits than its factorization.

823978524052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155499 (or 155497 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 55.

The spelling of 823978524052 in words is "eight hundred twenty-three billion, nine hundred seventy-eight million, five hundred twenty-four thousand, fifty-two".