61255525357 has 4 divisors (see below), whose sum is σ = 65967488860. Its totient is φ = 56543561856.

The previous prime is 61255525327. The next prime is 61255525393. The reversal of 61255525357 is 75352555216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18055565641 + 43199959716 = 134371^2 + 207846^2 .

It is a cyclic number.

It is not a de Polignac number, because 61255525357 - 2⁷ = 61255525229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61255525327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2355981732 + ... + 2355981757.

It is an arithmetic number, because the mean of its divisors is an integer number (16491872215).

Almost surely, 2^61255525357 is an apocalyptic number.

It is an amenable number.

61255525357 is a deficient number, since it is larger than the sum of its proper divisors (4711963503).

61255525357 is a wasteful number, since it uses less digits than its factorization.

61255525357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4711963502.

The product of its digits is 1575000, while the sum is 46.

The spelling of 61255525357 in words is "sixty-one billion, two hundred fifty-five million, five hundred twenty-five thousand, three hundred fifty-seven".