72225715429 has 4 divisors (see below), whose sum is σ = 82543674784. Its totient is φ = 61907756076.

The previous prime is 72225715369. The next prime is 72225715439. The reversal of 72225715429 is 92451752227.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92451752227 = 20129 ⋅4592963.

It is a cyclic number.

It is not a de Polignac number, because 72225715429 - 2⁷ = 72225715301 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 (72225715439) 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, 5158979667 + ... + 5158979680.

It is an arithmetic number, because the mean of its divisors is an integer number (20635918696).

Almost surely, 2^72225715429 is an apocalyptic number.

It is an amenable number.

72225715429 is a deficient number, since it is larger than the sum of its proper divisors (10317959355).

72225715429 is a wasteful number, since it uses less digits than its factorization.

72225715429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10317959354.

The product of its digits is 705600, while the sum is 46.

The spelling of 72225715429 in words is "seventy-two billion, two hundred twenty-five million, seven hundred fifteen thousand, four hundred twenty-nine".