61255545 has 32 divisors (see below), whose sum is σ = 107557632. Its totient is φ = 29582592.

The previous prime is 61255507. The next prime is 61255549. The reversal of 61255545 is 54555216.

It is not a de Polignac number, because 61255545 - 2⁸ = 61255289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61255549) 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 31 ways as a sum of consecutive naturals, for example, 7372 + ... + 13298.

It is an arithmetic number, because the mean of its divisors is an integer number (3361176).

Almost surely, 2^61255545 is an apocalyptic number.

61255545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61255545 is a deficient number, since it is larger than the sum of its proper divisors (46302087).

61255545 is a wasteful number, since it uses less digits than its factorization.

61255545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6001.

The product of its digits is 30000, while the sum is 33.

The square root of 61255545 is about 7826.5921702871. The cubic root of 61255545 is about 394.1986531192.

The spelling of 61255545 in words is "sixty-one million, two hundred fifty-five thousand, five hundred forty-five".