61216331353 has 6 divisors (see below), whose sum is σ = 61435037582. Its totient is φ = 60998400960.

The previous prime is 61216331327. The next prime is 61216331383. The reversal of 61216331353 is 35313361216.

It can be written as a sum of positive squares in 3 ways, for example, as 24953889024 + 36262442329 = 157968^2 + 190427^2 .

It is not a de Polignac number, because 61216331353 - 2²¹ = 61214234201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61216331383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 308676 + ... + 466597.

Almost surely, 2^61216331353 is an apocalyptic number.

It is an amenable number.

61216331353 is a deficient number, since it is larger than the sum of its proper divisors (218706229).

61216331353 is an frugal number, since it uses more digits than its factorization.

61216331353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775835 (or 775554 counting only the distinct ones).

The product of its digits is 29160, while the sum is 34.

Adding to 61216331353 its reverse (35313361216), we get a palindrome (96529692569).

The spelling of 61216331353 in words is "sixty-one billion, two hundred sixteen million, three hundred thirty-one thousand, three hundred fifty-three".