72447532051 has 4 divisors (see below), whose sum is σ = 73814466672. Its totient is φ = 71080597432.

The previous prime is 72447532033. The next prime is 72447532097. The reversal of 72447532051 is 15023574427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15023574427 = 5381 ⋅2791967.

It is a cyclic number.

It is not a de Polignac number, because 72447532051 - 2⁹ = 72447531539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72447531995 and 72447532013.

It is not an unprimeable number, because it can be changed into a prime (72447502051) 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, 683467231 + ... + 683467336.

It is an arithmetic number, because the mean of its divisors is an integer number (18453616668).

Almost surely, 2^72447532051 is an apocalyptic number.

72447532051 is a deficient number, since it is larger than the sum of its proper divisors (1366934621).

72447532051 is a wasteful number, since it uses less digits than its factorization.

72447532051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366934620.

The product of its (nonzero) digits is 235200, while the sum is 40.

The spelling of 72447532051 in words is "seventy-two billion, four hundred forty-seven million, five hundred thirty-two thousand, fifty-one".