72521080325441 has 4 divisors (see below), whose sum is σ = 79113905809584. Its totient is φ = 65928254841300.

The previous prime is 72521080325437. The next prime is 72521080325453. The reversal of 72521080325441 is 14452308012527.

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 a cyclic number.

It is not a de Polignac number, because 72521080325441 - 2² = 72521080325437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72521080325392 and 72521080325401.

It is not an unprimeable number, because it can be changed into a prime (72521080325461) 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, 3296412742055 + ... + 3296412742076.

It is an arithmetic number, because the mean of its divisors is an integer number (19778476452396).

Almost surely, 2^{72521080325441} is an apocalyptic number.

It is an amenable number.

72521080325441 is a deficient number, since it is larger than the sum of its proper divisors (6592825484143).

72521080325441 is a wasteful number, since it uses less digits than its factorization.

72521080325441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6592825484142.

The product of its (nonzero) digits is 537600, while the sum is 44.

Adding to 72521080325441 its reverse (14452308012527), we get a palindrome (86973388337968).

The spelling of 72521080325441 in words is "seventy-two trillion, five hundred twenty-one billion, eighty million, three hundred twenty-five thousand, four hundred forty-one".