61255525393 has 2 divisors, whose sum is σ = 61255525394. Its totient is φ = 61255525392.

The previous prime is 61255525327. The next prime is 61255525403. The reversal of 61255525393 is 39352555216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61254765009 + 760384 = 247497^2 + 872^2 .

It is a cyclic number.

It is not a de Polignac number, because 61255525393 - 2¹³ = 61255517201 is a prime.

It is not a weakly prime, because it can be changed into another prime (61253525393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30627762696 + 30627762697.

It is an arithmetic number, because the mean of its divisors is an integer number (30627762697).

Almost surely, 2^61255525393 is an apocalyptic number.

It is an amenable number.

61255525393 is a deficient number, since it is larger than the sum of its proper divisors (1).

61255525393 is an equidigital number, since it uses as much as digits as its factorization.

61255525393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1215000, while the sum is 46.

The spelling of 61255525393 in words is "sixty-one billion, two hundred fifty-five million, five hundred twenty-five thousand, three hundred ninety-three".