802579781997 has 128 divisors (see below), whose sum is σ = 1426067947520. Its totient is φ = 436465013760.

The previous prime is 802579781977. The next prime is 802579782083. The reversal of 802579781997 is 799187975208.

It is not a de Polignac number, because 802579781997 - 2²⁶ = 802512673133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (802579781977) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 156965913 + ... + 156971025.

It is an arithmetic number, because the mean of its divisors is an integer number (11141155840).

Almost surely, 2^802579781997 is an apocalyptic number.

It is an amenable number.

802579781997 is a deficient number, since it is larger than the sum of its proper divisors (623488165523).

802579781997 is a wasteful number, since it uses less digits than its factorization.

802579781997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5600 (or 5594 counting only the distinct ones).

The product of its (nonzero) digits is 160030080, while the sum is 72.

The spelling of 802579781997 in words is "eight hundred two billion, five hundred seventy-nine million, seven hundred eighty-one thousand, nine hundred ninety-seven".