81875333253 has 8 divisors (see below), whose sum is σ = 124762412608. Its totient is φ = 46785904704.

The previous prime is 81875333251. The next prime is 81875333321. The reversal of 81875333253 is 35233357818.

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

It is not a de Polignac number, because 81875333253 - 2¹ = 81875333251 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81875333251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1949412676 + ... + 1949412717.

It is an arithmetic number, because the mean of its divisors is an integer number (15595301576).

Almost surely, 2^81875333253 is an apocalyptic number.

It is an amenable number.

81875333253 is a deficient number, since it is larger than the sum of its proper divisors (42887079355).

81875333253 is a wasteful number, since it uses less digits than its factorization.

81875333253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3898825403.

The product of its digits is 1814400, while the sum is 48.

The spelling of 81875333253 in words is "eighty-one billion, eight hundred seventy-five million, three hundred thirty-three thousand, two hundred fifty-three".