60261132721521 has 4 divisors (see below), whose sum is σ = 80348176962032. Its totient is φ = 40174088481012.

The previous prime is 60261132721501. The next prime is 60261132721541. The reversal of 60261132721521 is 12512723116206.

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 an interprime number because it is at equal distance from previous prime (60261132721501) and next prime (60261132721541).

It is not a de Polignac number, because 60261132721521 - 2¹⁰ = 60261132720497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 60261132721521.

It is not an unprimeable number, because it can be changed into a prime (60261132721501) 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, 10043522120251 + ... + 10043522120256.

It is an arithmetic number, because the mean of its divisors is an integer number (20087044240508).

Almost surely, 2^{60261132721521} is an apocalyptic number.

It is an amenable number.

60261132721521 is a deficient number, since it is larger than the sum of its proper divisors (20087044240511).

60261132721521 is a wasteful number, since it uses less digits than its factorization.

60261132721521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20087044240510.

The product of its (nonzero) digits is 60480, while the sum is 39.

Adding to 60261132721521 its reverse (12512723116206), we get a palindrome (72773855837727).

The spelling of 60261132721521 in words is "sixty trillion, two hundred sixty-one billion, one hundred thirty-two million, seven hundred twenty-one thousand, five hundred twenty-one".