84126512816 has 20 divisors (see below), whose sum is σ = 163121609400. Its totient is φ = 42030613632.

The previous prime is 84126512809. The next prime is 84126512837. The reversal of 84126512816 is 61821562148.

It is a super-2 number, since 2×84126512816² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2018906 + ... + 2060153.

It is an arithmetic number, because the mean of its divisors is an integer number (8156080470).

Almost surely, 2^84126512816 is an apocalyptic number.

It is an amenable number.

84126512816 is a deficient number, since it is larger than the sum of its proper divisors (78995096584).

84126512816 is a wasteful number, since it uses less digits than its factorization.

84126512816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080356 (or 4080350 counting only the distinct ones).

The product of its digits is 184320, while the sum is 44.

The spelling of 84126512816 in words is "eighty-four billion, one hundred twenty-six million, five hundred twelve thousand, eight hundred sixteen".