53878253921 has 8 divisors (see below), whose sum is σ = 55648153344. Its totient is φ = 52110347760.

The previous prime is 53878253857. The next prime is 53878253927. The reversal of 53878253921 is 12935287835.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53878253921 - 2⁶ = 53878253857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53878253927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443270 + ... + 551583.

It is an arithmetic number, because the mean of its divisors is an integer number (6956019168).

Almost surely, 2^53878253921 is an apocalyptic number.

It is an amenable number.

53878253921 is a deficient number, since it is larger than the sum of its proper divisors (1769899423).

53878253921 is a wasteful number, since it uses less digits than its factorization.

53878253921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996631.

The product of its digits is 3628800, while the sum is 53.

The spelling of 53878253921 in words is "fifty-three billion, eight hundred seventy-eight million, two hundred fifty-three thousand, nine hundred twenty-one".