53506663639 has 16 divisors (see below), whose sum is σ = 63448479360. Its totient is φ = 44481051360.

The previous prime is 53506663631. The next prime is 53506663687. The reversal of 53506663639 is 93636660535.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 53506663639 - 2³ = 53506663631 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 (53506663631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1733169 + ... + 1763770.

It is an arithmetic number, because the mean of its divisors is an integer number (3965529960).

Almost surely, 2^53506663639 is an apocalyptic number.

53506663639 is a deficient number, since it is larger than the sum of its proper divisors (9941815721).

53506663639 is a wasteful number, since it uses less digits than its factorization.

53506663639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3497070.

The product of its (nonzero) digits is 7873200, while the sum is 52.

The spelling of 53506663639 in words is "fifty-three billion, five hundred six million, six hundred sixty-three thousand, six hundred thirty-nine".