53381533861 has 4 divisors (see below), whose sum is σ = 53382776832. Its totient is φ = 53380290892.

The previous prime is 53381533831. The next prime is 53381533937. The reversal of 53381533861 is 16833518335.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53381533861 - 2²¹ = 53379436709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53381533831) 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 3 ways as a sum of consecutive naturals, for example, 554671 + ... + 643756.

It is an arithmetic number, because the mean of its divisors is an integer number (13345694208).

Almost surely, 2^53381533861 is an apocalyptic number.

It is an amenable number.

53381533861 is a deficient number, since it is larger than the sum of its proper divisors (1242971).

53381533861 is a wasteful number, since it uses less digits than its factorization.

53381533861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242970.

The product of its digits is 777600, while the sum is 46.

The spelling of 53381533861 in words is "fifty-three billion, three hundred eighty-one million, five hundred thirty-three thousand, eight hundred sixty-one".