61255615 has 8 divisors (see below), whose sum is σ = 73579680. Its totient is φ = 48955872.

The previous prime is 61255613. The next prime is 61255643. The reversal of 61255615 is 51655216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61255615 - 2¹ = 61255613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61255613) 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 7 ways as a sum of consecutive naturals, for example, 22 + ... + 11068.

It is an arithmetic number, because the mean of its divisors is an integer number (9197460).

Almost surely, 2^61255615 is an apocalyptic number.

61255615 is a deficient number, since it is larger than the sum of its proper divisors (12324065).

61255615 is a wasteful number, since it uses less digits than its factorization.

61255615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12161.

The product of its digits is 9000, while the sum is 31.

The square root of 61255615 is about 7826.5966422194. The cubic root of 61255615 is about 394.1988032764.

The spelling of 61255615 in words is "sixty-one million, two hundred fifty-five thousand, six hundred fifteen".