83646744478 has 48 divisors (see below), whose sum is σ = 145623937104. Its totient is φ = 35730007040.

The previous prime is 83646744463. The next prime is 83646744479. The reversal of 83646744478 is 87444764638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83646744479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4294650 + ... + 4314082.

It is an arithmetic number, because the mean of its divisors is an integer number (3033832023).

Almost surely, 2^83646744478 is an apocalyptic number.

83646744478 is a deficient number, since it is larger than the sum of its proper divisors (61977192626).

83646744478 is a wasteful number, since it uses less digits than its factorization.

83646744478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20157 (or 20140 counting only the distinct ones).

The product of its digits is 86704128, while the sum is 61.

The spelling of 83646744478 in words is "eighty-three billion, six hundred forty-six million, seven hundred forty-four thousand, four hundred seventy-eight".