691215846448 has 20 divisors (see below), whose sum is σ = 1409716529560. Its totient is φ = 327418032384.

The previous prime is 691215846383. The next prime is 691215846463. The reversal of 691215846448 is 844648512196.

It is a super-2 number, since 2×691215846448² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 691215846392 and 691215846401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136867865 + ... + 1136868472.

It is an arithmetic number, because the mean of its divisors is an integer number (70485826478).

Almost surely, 2^691215846448 is an apocalyptic number.

It is an amenable number.

691215846448 is an abundant number, since it is smaller than the sum of its proper divisors (718500683112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691215846448 is a wasteful number, since it uses less digits than its factorization.

691215846448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273736364 (or 2273736358 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 58.

The spelling of 691215846448 in words is "six hundred ninety-one billion, two hundred fifteen million, eight hundred forty-six thousand, four hundred forty-eight".