84407746477 has 4 divisors (see below), whose sum is σ = 84895652700. Its totient is φ = 83919840256.

The previous prime is 84407746471. The next prime is 84407746481. The reversal of 84407746477 is 77464770448.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78946388676 + 5461357801 = 280974^2 + 73901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84407746477 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84407746471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243952852 + ... + 243953197.

It is an arithmetic number, because the mean of its divisors is an integer number (21223913175).

Almost surely, 2^84407746477 is an apocalyptic number.

It is an amenable number.

84407746477 is a deficient number, since it is larger than the sum of its proper divisors (487906223).

84407746477 is a wasteful number, since it uses less digits than its factorization.

84407746477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487906222.

The product of its (nonzero) digits is 29503488, while the sum is 58.

The spelling of 84407746477 in words is "eighty-four billion, four hundred seven million, seven hundred forty-six thousand, four hundred seventy-seven".