53919608513 has 4 divisors (see below), whose sum is σ = 53947974228. Its totient is φ = 53891242800.

The previous prime is 53919608473. The next prime is 53919608531. The reversal of 53919608513 is 31580691935.

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 14369536129 + 39550072384 = 119873^2 + 198872^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53919608513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53919608573) 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, 14180006 + ... + 14183807.

It is an arithmetic number, because the mean of its divisors is an integer number (13486993557).

Almost surely, 2^53919608513 is an apocalyptic number.

It is an amenable number.

53919608513 is a deficient number, since it is larger than the sum of its proper divisors (28365715).

53919608513 is a wasteful number, since it uses less digits than its factorization.

53919608513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28365714.

The product of its (nonzero) digits is 874800, while the sum is 50.

The spelling of 53919608513 in words is "fifty-three billion, nine hundred nineteen million, six hundred eight thousand, five hundred thirteen".