72145427749 has 8 divisors (see below), whose sum is σ = 72475927808. Its totient is φ = 71815656240.

The previous prime is 72145427741. The next prime is 72145427771. The reversal of 72145427749 is 94772454127.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72145427749 - 2³ = 72145427741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72145427696 and 72145427705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72145427741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16864 + ... + 380230.

It is an arithmetic number, because the mean of its divisors is an integer number (9059490976).

Almost surely, 2^72145427749 is an apocalyptic number.

It is an amenable number.

72145427749 is a deficient number, since it is larger than the sum of its proper divisors (330500059).

72145427749 is a wasteful number, since it uses less digits than its factorization.

72145427749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364275.

The product of its digits is 3951360, while the sum is 52.

The spelling of 72145427749 in words is "seventy-two billion, one hundred forty-five million, four hundred twenty-seven thousand, seven hundred forty-nine".