816464834515 has 8 divisors (see below), whose sum is σ = 1068826692528. Its totient is φ = 593792606880.

The previous prime is 816464834503. The next prime is 816464834531. The reversal of 816464834515 is 515438464618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 816464834515 - 2³¹ = 814317350867 is a prime.

It is a super-2 number, since 2×816464834515² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55), and also a Moran number because the ratio is a prime number: 14844815173 = 816464834515 / (8 + 1 + 6 + 4 + 6 + 4 + 8 + 3 + 4 + 5 + 1 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7422407532 + ... + 7422407641.

It is an arithmetic number, because the mean of its divisors is an integer number (133603336566).

Almost surely, 2^816464834515 is an apocalyptic number.

816464834515 is a deficient number, since it is larger than the sum of its proper divisors (252361858013).

816464834515 is a wasteful number, since it uses less digits than its factorization.

816464834515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14844815189.

The product of its digits is 11059200, while the sum is 55.

The spelling of 816464834515 in words is "eight hundred sixteen billion, four hundred sixty-four million, eight hundred thirty-four thousand, five hundred fifteen".