61255567 has 4 divisors (see below), whose sum is σ = 61271496. Its totient is φ = 61239640.

The previous prime is 61255559. The next prime is 61255613. The reversal of 61255567 is 76555216.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61255567 - 2³ = 61255559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61255507) 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 3 ways as a sum of consecutive naturals, for example, 1773 + ... + 11209.

It is an arithmetic number, because the mean of its divisors is an integer number (15317874).

Almost surely, 2^61255567 is an apocalyptic number.

61255567 is a deficient number, since it is larger than the sum of its proper divisors (15929).

61255567 is an equidigital number, since it uses as much as digits as its factorization.

61255567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15928.

The product of its digits is 63000, while the sum is 37.

The square root of 61255567 is about 7826.5935757518. The cubic root of 61255567 is about 394.1987003115.

The spelling of 61255567 in words is "sixty-one million, two hundred fifty-five thousand, five hundred sixty-seven".