8477434778493 has 64 divisors (see below), whose sum is σ = 12168312307200. Its totient is φ = 5230671593472.

The previous prime is 8477434778471. The next prime is 8477434778503. The reversal of 8477434778493 is 3948774347748.

It is a happy number.

It is not a de Polignac number, because 8477434778493 - 2¹² = 8477434774397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8477434778443) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2089580121 + ... + 2089584177.

It is an arithmetic number, because the mean of its divisors is an integer number (190129879800).

Almost surely, 2^{8477434778493} is an apocalyptic number.

It is an amenable number.

8477434778493 is a deficient number, since it is larger than the sum of its proper divisors (3690877528707).

8477434778493 is a wasteful number, since it uses less digits than its factorization.

8477434778493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5686.

The product of its digits is 3186376704, while the sum is 75.

The spelling of 8477434778493 in words is "eight trillion, four hundred seventy-seven billion, four hundred thirty-four million, seven hundred seventy-eight thousand, four hundred ninety-three".