72411630347561 has 4 divisors (see below), whose sum is σ = 72425208382212. Its totient is φ = 72398052312912.

The previous prime is 72411630347549. The next prime is 72411630347599. The reversal of 72411630347561 is 16574303611427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49171565915536 + 23240064432025 = 7012244^2 + 4820795^2 .

It is a cyclic number.

It is not a de Polignac number, because 72411630347561 - 2¹⁰ = 72411630346537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72411630347261) 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, 6789009326 + ... + 6789019991.

It is an arithmetic number, because the mean of its divisors is an integer number (18106302095553).

Almost surely, 2^{72411630347561} is an apocalyptic number.

It is an amenable number.

72411630347561 is a deficient number, since it is larger than the sum of its proper divisors (13578034651).

72411630347561 is a wasteful number, since it uses less digits than its factorization.

72411630347561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13578034650.

The product of its (nonzero) digits is 2540160, while the sum is 50.

Adding to 72411630347561 its reverse (16574303611427), we get a palindrome (88985933958988).

The spelling of 72411630347561 in words is "seventy-two trillion, four hundred eleven billion, six hundred thirty million, three hundred forty-seven thousand, five hundred sixty-one".