53784021881 has 16 divisors (see below), whose sum is σ = 58501305216. Its totient is φ = 49240025856.

The previous prime is 53784021871. The next prime is 53784021883. The reversal of 53784021881 is 18812048735.

53784021881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 53784021881 - 2¹⁸ = 53783759737 is a prime.

It is a super-3 number, since 3×53784021881³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (53784021883) 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, 3456140 + ... + 3471666.

It is an arithmetic number, because the mean of its divisors is an integer number (3656331576).

Almost surely, 2^53784021881 is an apocalyptic number.

It is an amenable number.

53784021881 is a deficient number, since it is larger than the sum of its proper divisors (4717283335).

53784021881 is a wasteful number, since it uses less digits than its factorization.

53784021881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21088.

The product of its (nonzero) digits is 430080, while the sum is 47.

The spelling of 53784021881 in words is "fifty-three billion, seven hundred eighty-four million, twenty-one thousand, eight hundred eighty-one".