821949148250 has 32 divisors (see below), whose sum is σ = 1571426887680. Its totient is φ = 321784342800.

The previous prime is 821949148231. The next prime is 821949148271. The reversal of 821949148250 is 52841949128.

It is a junction number, because it is equal to n+sod(n) for n = 821949148192 and 821949148201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34964810 + ... + 34988309.

It is an arithmetic number, because the mean of its divisors is an integer number (49107090240).

Almost surely, 2^821949148250 is an apocalyptic number.

821949148250 is a deficient number, since it is larger than the sum of its proper divisors (749477739430).

821949148250 is a wasteful number, since it uses less digits than its factorization.

821949148250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69953183 (or 69953173 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 821949148250 in words is "eight hundred twenty-one billion, nine hundred forty-nine million, one hundred forty-eight thousand, two hundred fifty".