61722611 has 4 divisors (see below), whose sum is σ = 62643912. Its totient is φ = 60801312.

The previous prime is 61722607. The next prime is 61722637. The reversal of 61722611 is 11622716.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61722611 - 2² = 61722607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61722641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460550 + ... + 460683.

It is an arithmetic number, because the mean of its divisors is an integer number (15660978).

Almost surely, 2^61722611 is an apocalyptic number.

61722611 is a deficient number, since it is larger than the sum of its proper divisors (921301).

61722611 is an equidigital number, since it uses as much as digits as its factorization.

61722611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921300.

The product of its digits is 1008, while the sum is 26.

The square root of 61722611 is about 7856.3739091263. The cubic root of 61722611 is about 395.1980228057.

The spelling of 61722611 in words is "sixty-one million, seven hundred twenty-two thousand, six hundred eleven".