821479981595 has 128 divisors (see below), whose sum is σ = 1323297669120. Its totient is φ = 474911424000.

The previous prime is 821479981579. The next prime is 821479981661. The reversal of 821479981595 is 595189974128.

It is not a de Polignac number, because 821479981595 - 2⁴ = 821479981579 is a prime.

It is a super-2 number, since 2×821479981595² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 72620990 + ... + 72632300.

It is an arithmetic number, because the mean of its divisors is an integer number (10338263040).

Almost surely, 2^821479981595 is an apocalyptic number.

821479981595 is a deficient number, since it is larger than the sum of its proper divisors (501817687525).

821479981595 is a wasteful number, since it uses less digits than its factorization.

821479981595 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11657.

The product of its digits is 65318400, while the sum is 68.

The spelling of 821479981595 in words is "eight hundred twenty-one billion, four hundred seventy-nine million, nine hundred eighty-one thousand, five hundred ninety-five".