806505518347465 has 16 divisors (see below), whose sum is σ = 1009889652496896. Its totient is φ = 617149310008000.

The previous prime is 806505518347427. The next prime is 806505518347489. The reversal of 806505518347465 is 564743815505608.

It is a happy number.

It is not a de Polignac number, because 806505518347465 - 2⁷ = 806505518347337 is a prime.

It is a super-2 number, since 2×806505518347465² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 806505518347465.

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, 10656015 + ... + 41551915.

It is an arithmetic number, because the mean of its divisors is an integer number (63118103281056).

Almost surely, 2^{806505518347465} is an apocalyptic number.

It is an amenable number.

806505518347465 is a deficient number, since it is larger than the sum of its proper divisors (203384134149431).

806505518347465 is a wasteful number, since it uses less digits than its factorization.

806505518347465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31122920.

The product of its (nonzero) digits is 483840000, while the sum is 67.

The spelling of 806505518347465 in words is "eight hundred six trillion, five hundred five billion, five hundred eighteen million, three hundred forty-seven thousand, four hundred sixty-five".