61440255 has 32 divisors (see below), whose sum is σ = 109824000. Its totient is φ = 32589216.

The previous prime is 61440251. The next prime is 61440257. The reversal of 61440255 is 55204416.

61440255 is a `hidden beast` number, since 614 + 40 + 2 + 5 + 5 = 666.

It is not a de Polignac number, because 61440255 - 2² = 61440251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61440251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25722 + ... + 28008.

It is an arithmetic number, because the mean of its divisors is an integer number (3432000).

Almost surely, 2^61440255 is an apocalyptic number.

61440255 is a deficient number, since it is larger than the sum of its proper divisors (48383745).

61440255 is a wasteful number, since it uses less digits than its factorization.

61440255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500 (or 2494 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 61440255 is about 7838.3834430321. The cubic root of 61440255 is about 394.5944777984.

The spelling of 61440255 in words is "sixty-one million, four hundred forty thousand, two hundred fifty-five".