72181232853 has 4 divisors (see below), whose sum is σ = 96241643808. Its totient is φ = 48120821900.

The previous prime is 72181232843. The next prime is 72181232863. The reversal of 72181232853 is 35823218127.

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 an interprime number because it is at equal distance from previous prime (72181232843) and next prime (72181232863).

It is a cyclic number.

It is not a de Polignac number, because 72181232853 - 2⁵ = 72181232821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72181232813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12030205473 + ... + 12030205478.

It is an arithmetic number, because the mean of its divisors is an integer number (24060410952).

Almost surely, 2^72181232853 is an apocalyptic number.

It is an amenable number.

72181232853 is a deficient number, since it is larger than the sum of its proper divisors (24060410955).

72181232853 is a wasteful number, since it uses less digits than its factorization.

72181232853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24060410954.

The product of its digits is 161280, while the sum is 42.

The spelling of 72181232853 in words is "seventy-two billion, one hundred eighty-one million, two hundred thirty-two thousand, eight hundred fifty-three".