61513322553 has 6 divisors (see below), whose sum is σ = 88852577034. Its totient is φ = 41008881696.

The previous prime is 61513322539. The next prime is 61513322557. The reversal of 61513322553 is 35522331516.

61513322553 is a `hidden beast` number, since 6 + 1 + 51 + 33 + 22 + 553 = 666.

61513322553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 55162507689 + 6350814864 = 234867^2 + 79692^2 .

It is not a de Polignac number, because 61513322553 - 2¹³ = 61513314361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61513322557) 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, 3417406800 + ... + 3417406817.

It is an arithmetic number, because the mean of its divisors is an integer number (14808762839).

Almost surely, 2^61513322553 is an apocalyptic number.

It is an amenable number.

61513322553 is a deficient number, since it is larger than the sum of its proper divisors (27339254481).

61513322553 is a wasteful number, since it uses less digits than its factorization.

61513322553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6834813623 (or 6834813620 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The spelling of 61513322553 in words is "sixty-one billion, five hundred thirteen million, three hundred twenty-two thousand, five hundred fifty-three".