54638505243653 has 4 divisors (see below), whose sum is σ = 54685893367308. Its totient is φ = 54591117120000.

The previous prime is 54638505243631. The next prime is 54638505243659. The reversal of 54638505243653 is 35634250583645.

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 34472316343969 + 20166188899684 = 5871313^2 + 4490678^2 .

It is a cyclic number.

It is not a de Polignac number, because 54638505243653 - 2²⁶ = 54638438134789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54638505243592 and 54638505243601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54638505243659) 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, 23694060098 + ... + 23694062403.

It is an arithmetic number, because the mean of its divisors is an integer number (13671473341827).

Almost surely, 2^{54638505243653} is an apocalyptic number.

It is an amenable number.

54638505243653 is a deficient number, since it is larger than the sum of its proper divisors (47388123655).

54638505243653 is a wasteful number, since it uses less digits than its factorization.

54638505243653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47388123654.

The product of its (nonzero) digits is 155520000, while the sum is 59.

The spelling of 54638505243653 in words is "fifty-four trillion, six hundred thirty-eight billion, five hundred five million, two hundred forty-three thousand, six hundred fifty-three".