53867033721 has 32 divisors (see below), whose sum is σ = 80244769920. Its totient is φ = 35713032192.

The previous prime is 53867033687. The next prime is 53867033729. The reversal of 53867033721 is 12733076835.

53867033721 is a `hidden beast` number, since 538 + 67 + 0 + 3 + 37 + 21 = 666.

It is not a de Polignac number, because 53867033721 - 2¹⁰ = 53867032697 is a prime.

It is a super-2 number, since 2×53867033721² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53867033729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4455741 + ... + 4467813.

It is an arithmetic number, because the mean of its divisors is an integer number (2507649060).

Almost surely, 2^53867033721 is an apocalyptic number.

It is an amenable number.

53867033721 is a deficient number, since it is larger than the sum of its proper divisors (26377736199).

53867033721 is a wasteful number, since it uses less digits than its factorization.

53867033721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12982 (or 12976 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 53867033721 in words is "fifty-three billion, eight hundred sixty-seven million, thirty-three thousand, seven hundred twenty-one".