61119211729 has 3 divisors (see below), whose sum is σ = 61119458953. Its totient is φ = 61118964506.

The previous prime is 61119211691. The next prime is 61119211753. The reversal of 61119211729 is 92711291116.

The square root of 61119211729 is 247223.

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 61119211729 - 2¹¹ = 61119209681 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61119211691 and 61119211700.

It is not an unprimeable number, because it can be changed into a prime (61119211789) 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, 123612 + ... + 370834.

Almost surely, 2^61119211729 is an apocalyptic number.

61119211729 is the 247223-rd square number.

61119211729 is the 123612-nd centered octagonal number.

It is an amenable number.

61119211729 is a deficient number, since it is larger than the sum of its proper divisors (247224).

61119211729 is an frugal number, since it uses more digits than its factorization.

61119211729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494446 (or 247223 counting only the distinct ones).

The product of its digits is 13608, while the sum is 40.

The spelling of 61119211729 in words is "sixty-one billion, one hundred nineteen million, two hundred eleven thousand, seven hundred twenty-nine".