83684447648 has 12 divisors (see below), whose sum is σ = 164753756370. Its totient is φ = 41842223808.

The previous prime is 83684447569. The next prime is 83684447689. The reversal of 83684447648 is 84674448638.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 59588715664 + 24095731984 = 244108^2 + 155228^2 .

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1307569463 + ... + 1307569526.

Almost surely, 2^83684447648 is an apocalyptic number.

It is an amenable number.

83684447648 is a deficient number, since it is larger than the sum of its proper divisors (81069308722).

83684447648 is a wasteful number, since it uses less digits than its factorization.

83684447648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2615138999 (or 2615138991 counting only the distinct ones).

The product of its digits is 99090432, while the sum is 62.

The spelling of 83684447648 in words is "eighty-three billion, six hundred eighty-four million, four hundred forty-seven thousand, six hundred forty-eight".