53747881921 has 16 divisors (see below), whose sum is σ = 57154277376. Its totient is φ = 50369147136.

The previous prime is 53747881919. The next prime is 53747881939. The reversal of 53747881921 is 12918874735.

It is not a de Polignac number, because 53747881921 - 2¹ = 53747881919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53747881951) 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 15 ways as a sum of consecutive naturals, for example, 3954880 + ... + 3968446.

It is an arithmetic number, because the mean of its divisors is an integer number (3572142336).

Almost surely, 2^53747881921 is an apocalyptic number.

It is an amenable number.

53747881921 is a deficient number, since it is larger than the sum of its proper divisors (3406395455).

53747881921 is a wasteful number, since it uses less digits than its factorization.

53747881921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14568.

The product of its digits is 3386880, while the sum is 55.

The spelling of 53747881921 in words is "fifty-three billion, seven hundred forty-seven million, eight hundred eighty-one thousand, nine hundred twenty-one".