821134675692 has 72 divisors (see below), whose sum is σ = 2152982347152. Its totient is φ = 273652992000.

The previous prime is 821134675667. The next prime is 821134675723. The reversal of 821134675692 is 296576431128.

It is a happy number.

821134675692 is a `hidden beast` number, since 8 + 2 + 1 + 13 + 4 + 67 + 569 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4578592 + ... + 4754552.

Almost surely, 2^821134675692 is an apocalyptic number.

It is an amenable number.

821134675692 is an abundant number, since it is smaller than the sum of its proper divisors (1331847671460).

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

821134675692 is a wasteful number, since it uses less digits than its factorization.

821134675692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180781 (or 180767 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 821134675692 in words is "eight hundred twenty-one billion, one hundred thirty-four million, six hundred seventy-five thousand, six hundred ninety-two".