60911720809 has 3 divisors (see below), whose sum is σ = 60911967613. Its totient is φ = 60911474006.

The previous prime is 60911720777. The next prime is 60911720873. The reversal of 60911720809 is 90802711906.

The square root of 60911720809 is 246803.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 60911720809 - 2⁵ = 60911720777 is a prime.

It is a super-2 number, since 2×60911720809² (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 (60911720509) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 123402 + ... + 370204.

Almost surely, 2^60911720809 is an apocalyptic number.

60911720809 is the 246803-rd square number.

60911720809 is the 123402-nd centered octagonal number.

It is an amenable number.

60911720809 is a deficient number, since it is larger than the sum of its proper divisors (246804).

60911720809 is an frugal number, since it uses more digits than its factorization.

60911720809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493606 (or 246803 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 43.

It can be divided in two parts, 609117 and 20809, that added together give a palindrome (629926).

The spelling of 60911720809 in words is "sixty billion, nine hundred eleven million, seven hundred twenty thousand, eight hundred nine".