53640534447 has 8 divisors (see below), whose sum is σ = 79467458480. Its totient is φ = 35760356280.

The previous prime is 53640534433. The next prime is 53640534457. The reversal of 53640534447 is 74443504635.

53640534447 is a `hidden beast` number, since 5 + 36 + 40 + 534 + 4 + 47 = 666.

It is not a de Polignac number, because 53640534447 - 2⁶ = 53640534383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53640534407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 993343204 + ... + 993343257.

It is an arithmetic number, because the mean of its divisors is an integer number (9933432310).

Almost surely, 2^53640534447 is an apocalyptic number.

53640534447 is a deficient number, since it is larger than the sum of its proper divisors (25826924033).

53640534447 is a wasteful number, since it uses less digits than its factorization.

53640534447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986686470 (or 1986686464 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 45.

The spelling of 53640534447 in words is "fifty-three billion, six hundred forty million, five hundred thirty-four thousand, four hundred forty-seven".