60911628721 has 4 divisors (see below), whose sum is σ = 62397278244. Its totient is φ = 59425979200.

The previous prime is 60911628641. The next prime is 60911628749. The reversal of 60911628721 is 12782611906.

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 28380456225 + 32531172496 = 168465^2 + 180364^2 .

It is a cyclic number.

It is not a de Polignac number, because 60911628721 - 2²⁹ = 60374757809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (60911628121) 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, 742824700 + ... + 742824781.

It is an arithmetic number, because the mean of its divisors is an integer number (15599319561).

Almost surely, 2^60911628721 is an apocalyptic number.

It is an amenable number.

60911628721 is a deficient number, since it is larger than the sum of its proper divisors (1485649523).

60911628721 is a wasteful number, since it uses less digits than its factorization.

60911628721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485649522.

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 60911628721 in words is "sixty billion, nine hundred eleven million, six hundred twenty-eight thousand, seven hundred twenty-one".