808081645 has 16 divisors (see below), whose sum is σ = 1118039040. Its totient is φ = 549206784.

The previous prime is 808081633. The next prime is 808081657. The reversal of 808081645 is 546180808.

It is an interprime number because it is at equal distance from previous prime (808081633) and next prime (808081657).

It is not a de Polignac number, because 808081645 - 2⁵ = 808081613 is a prime.

It is a super-3 number, since 3×808081645³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 808081598 and 808081607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98205 + ... + 106114.

It is an arithmetic number, because the mean of its divisors is an integer number (69877440).

Almost surely, 2^808081645 is an apocalyptic number.

It is an amenable number.

808081645 is a deficient number, since it is larger than the sum of its proper divisors (309957395).

808081645 is a wasteful number, since it uses less digits than its factorization.

808081645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204444.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 808081645 is about 28426.7769013654. The cubic root of 808081645 is about 931.4332719185.

The spelling of 808081645 in words is "eight hundred eight million, eighty-one thousand, six hundred forty-five".