8261721050 has 48 divisors (see below), whose sum is σ = 17038668384. Its totient is φ = 2955000000.

The previous prime is 8261721029. The next prime is 8261721067. The reversal of 8261721050 is 501271628.

It is a junction number, because it is equal to n+sod(n) for n = 8261720998 and 8261721016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89576 + ... + 156675.

It is an arithmetic number, because the mean of its divisors is an integer number (354972258).

Almost surely, 2^8261721050 is an apocalyptic number.

8261721050 is an abundant number, since it is smaller than the sum of its proper divisors (8776947334).

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

8261721050 is a wasteful number, since it uses less digits than its factorization.

8261721050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246335 (or 246330 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 8261721050 is about 90894.0099786559. The cubic root of 8261721050 is about 2021.5764782263.

Adding to 8261721050 its reverse (501271628), we get a palindrome (8762992678).

The spelling of 8261721050 in words is "eight billion, two hundred sixty-one million, seven hundred twenty-one thousand, fifty".