802658640091 has 16 divisors (see below), whose sum is σ = 1059582988800. Its totient is φ = 588657214080.

The previous prime is 802658640029. The next prime is 802658640109. The reversal of 802658640091 is 190046856208.

It is a cyclic number.

It is not a de Polignac number, because 802658640091 - 2¹¹ = 802658638043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (802658640391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306590991 + ... + 306593608.

It is an arithmetic number, because the mean of its divisors is an integer number (66223936800).

Almost surely, 2^802658640091 is an apocalyptic number.

802658640091 is a deficient number, since it is larger than the sum of its proper divisors (256924348709).

802658640091 is a wasteful number, since it uses less digits than its factorization.

802658640091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613184634.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 802658640091 in words is "eight hundred two billion, six hundred fifty-eight million, six hundred forty thousand, ninety-one".