72852220851 has 4 divisors (see below), whose sum is σ = 97136294472. Its totient is φ = 48568147232.

The previous prime is 72852220843. The next prime is 72852220873. The reversal of 72852220851 is 15802225827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15802225827 = 3 ⋅5267408609.

It is a cyclic number.

It is not a de Polignac number, because 72852220851 - 2³ = 72852220843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72852220811) 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, 12142036806 + ... + 12142036811.

It is an arithmetic number, because the mean of its divisors is an integer number (24284073618).

Almost surely, 2^72852220851 is an apocalyptic number.

72852220851 is a deficient number, since it is larger than the sum of its proper divisors (24284073621).

72852220851 is a wasteful number, since it uses less digits than its factorization.

72852220851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24284073620.

The product of its (nonzero) digits is 179200, while the sum is 42.

The spelling of 72852220851 in words is "seventy-two billion, eight hundred fifty-two million, two hundred twenty thousand, eight hundred fifty-one".