60135561472721 has 16 divisors (see below), whose sum is σ = 69399071844480. Its totient is φ = 51040652480640.

The previous prime is 60135561472717. The next prime is 60135561472751. The reversal of 60135561472721 is 12727416553106.

It is a cyclic number.

It is not a de Polignac number, because 60135561472721 - 2² = 60135561472717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 60135561472721.

It is not an unprimeable number, because it can be changed into a prime (60135561472751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15890786 + ... + 19307723.

It is an arithmetic number, because the mean of its divisors is an integer number (4337441990280).

Almost surely, 2^{60135561472721} is an apocalyptic number.

It is an amenable number.

60135561472721 is a deficient number, since it is larger than the sum of its proper divisors (9263510371759).

60135561472721 is a wasteful number, since it uses less digits than its factorization.

60135561472721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35200904.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 60135561472721 in words is "sixty trillion, one hundred thirty-five billion, five hundred sixty-one million, four hundred seventy-two thousand, seven hundred twenty-one".