53643406438 has 16 divisors (see below), whose sum is σ = 81032936400. Its totient is φ = 26632551456.

The previous prime is 53643406417. The next prime is 53643406441. The reversal of 53643406438 is 83460434635.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 884620 + ... + 943312.

It is an arithmetic number, because the mean of its divisors is an integer number (5064558525).

Almost surely, 2^53643406438 is an apocalyptic number.

53643406438 is a deficient number, since it is larger than the sum of its proper divisors (27389529962).

53643406438 is a wasteful number, since it uses less digits than its factorization.

53643406438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61911.

The product of its (nonzero) digits is 2488320, while the sum is 46.

The spelling of 53643406438 in words is "fifty-three billion, six hundred forty-three million, four hundred six thousand, four hundred thirty-eight".