60921814561 has 4 divisors (see below), whose sum is σ = 60952694292. Its totient is φ = 60890934832.

The previous prime is 60921814553. The next prime is 60921814589. The reversal of 60921814561 is 16541812906.

60921814561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12175798336 + 48746016225 = 110344^2 + 220785^2 .

It is a cyclic number.

It is not a de Polignac number, because 60921814561 - 2³ = 60921814553 is a prime.

It is a super-2 number, since 2×60921814561² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (60921814501) 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, 15436906 + ... + 15440851.

It is an arithmetic number, because the mean of its divisors is an integer number (15238173573).

Almost surely, 2^60921814561 is an apocalyptic number.

It is an amenable number.

60921814561 is a deficient number, since it is larger than the sum of its proper divisors (30879731).

60921814561 is a wasteful number, since it uses less digits than its factorization.

60921814561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30879730.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 60921814561 in words is "sixty billion, nine hundred twenty-one million, eight hundred fourteen thousand, five hundred sixty-one".