61322102689 has 3 divisors (see below), whose sum is σ = 61322350323. Its totient is φ = 61321855056.

The previous prime is 61322102663. The next prime is 61322102701. The reversal of 61322102689 is 98620122316.

The square root of 61322102689 is 247633.

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 can be written as a sum of positive squares in only one way, i.e., 15779128225 + 45542974464 = 125615^2 + 213408^2 .

It is a de Polignac number, because none of the positive numbers 2^k-61322102689 is a prime.

It is a super-2 number, since 2×61322102689² (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 (61322102609) 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, 123817 + ... + 371449.

It is an arithmetic number, because the mean of its divisors is an integer number (20440783441).

Almost surely, 2^61322102689 is an apocalyptic number.

61322102689 is the 247633-rd square number.

61322102689 is the 123817-th centered octagonal number.

It is an amenable number.

61322102689 is a deficient number, since it is larger than the sum of its proper divisors (247634).

61322102689 is an frugal number, since it uses more digits than its factorization.

61322102689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495266 (or 247633 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 61322102689 in words is "sixty-one billion, three hundred twenty-two million, one hundred two thousand, six hundred eighty-nine".