821774952033 has 32 divisors (see below), whose sum is σ = 1288523292672. Its totient is φ = 456077865600.

The previous prime is 821774951981. The next prime is 821774952067. The reversal of 821774952033 is 330259477128.

It is not a de Polignac number, because 821774952033 - 2⁹ = 821774951521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (821774952083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1948003 + ... + 2332008.

It is an arithmetic number, because the mean of its divisors is an integer number (40266352896).

Almost surely, 2^821774952033 is an apocalyptic number.

It is an amenable number.

821774952033 is a deficient number, since it is larger than the sum of its proper divisors (466748340639).

821774952033 is a wasteful number, since it uses less digits than its factorization.

821774952033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280285.

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 821774952033 in words is "eight hundred twenty-one billion, seven hundred seventy-four million, nine hundred fifty-two thousand, thirty-three".