521848979829 has 24 divisors (see below), whose sum is σ = 778332382464. Its totient is φ = 336575088000.

The previous prime is 521848979819. The next prime is 521848979833. The reversal of 521848979829 is 928979848125.

521848979829 is a `hidden beast` number, since 52 + 1 + 8 + 489 + 7 + 98 + 2 + 9 = 666.

It is not a de Polignac number, because 521848979829 - 2⁹ = 521848979317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521848979809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 648589 + ... + 1210109.

It is an arithmetic number, because the mean of its divisors is an integer number (32430515936).

Almost surely, 2^521848979829 is an apocalyptic number.

It is an amenable number.

521848979829 is a deficient number, since it is larger than the sum of its proper divisors (256483402635).

521848979829 is a wasteful number, since it uses less digits than its factorization.

521848979829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564889 (or 564886 counting only the distinct ones).

The product of its digits is 209018880, while the sum is 72.

The spelling of 521848979829 in words is "five hundred twenty-one billion, eight hundred forty-eight million, nine hundred seventy-nine thousand, eight hundred twenty-nine".