61273451313 has 12 divisors (see below), whose sum is σ = 88513383348. Its totient is φ = 40845604320.

The previous prime is 61273451287. The next prime is 61273451341. The reversal of 61273451313 is 31315437216.

61273451313 is a `hidden beast` number, since 6 + 127 + 3 + 4 + 513 + 13 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25449182784 + 35824268529 = 159528^2 + 189273^2 .

It is not a de Polignac number, because 61273451313 - 2⁶ = 61273451249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61273451363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162270 + ... + 385847.

It is an arithmetic number, because the mean of its divisors is an integer number (7376115279).

Almost surely, 2^61273451313 is an apocalyptic number.

It is an amenable number.

61273451313 is a deficient number, since it is larger than the sum of its proper divisors (27239932035).

61273451313 is a wasteful number, since it uses less digits than its factorization.

61273451313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560544 (or 560541 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

Adding to 61273451313 its reverse (31315437216), we get a palindrome (92588888529).

The spelling of 61273451313 in words is "sixty-one billion, two hundred seventy-three million, four hundred fifty-one thousand, three hundred thirteen".