61312506106523 has 24 divisors (see below), whose sum is σ = 71566277620032. Its totient is φ = 52374392746704.

The previous prime is 61312506106493. The next prime is 61312506106549. The reversal of 61312506106523 is 32560160521316.

It is not a de Polignac number, because 61312506106523 - 2¹⁴ = 61312506090139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61312506108523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16306640 + ... + 19711202.

It is an arithmetic number, because the mean of its divisors is an integer number (2981928234168).

Almost surely, 2^{61312506106523} is an apocalyptic number.

61312506106523 is a deficient number, since it is larger than the sum of its proper divisors (10253771513509).

61312506106523 is a wasteful number, since it uses less digits than its factorization.

61312506106523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3405831 (or 3405824 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 41.

Adding to 61312506106523 its reverse (32560160521316), we get a palindrome (93872666627839).

The spelling of 61312506106523 in words is "sixty-one trillion, three hundred twelve billion, five hundred six million, one hundred six thousand, five hundred twenty-three".