61303343253 has 4 divisors (see below), whose sum is σ = 81737791008. Its totient is φ = 40868895500.

The previous prime is 61303343249. The next prime is 61303343261. The reversal of 61303343253 is 35234330316.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61303343253 - 2² = 61303343249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61303343243) 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, 10217223873 + ... + 10217223878.

It is an arithmetic number, because the mean of its divisors is an integer number (20434447752).

Almost surely, 2^61303343253 is an apocalyptic number.

It is an amenable number.

61303343253 is a deficient number, since it is larger than the sum of its proper divisors (20434447755).

61303343253 is a wasteful number, since it uses less digits than its factorization.

61303343253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20434447754.

The product of its (nonzero) digits is 58320, while the sum is 33.

Adding to 61303343253 its reverse (35234330316), we get a palindrome (96537673569).

The spelling of 61303343253 in words is "sixty-one billion, three hundred three million, three hundred forty-three thousand, two hundred fifty-three".