61389255 has 16 divisors (see below), whose sum is σ = 98550144. Its totient is φ = 32631840.

The previous prime is 61389233. The next prime is 61389271. The reversal of 61389255 is 55298316.

It is not a de Polignac number, because 61389255 - 2¹⁰ = 61388231 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2061 + ... + 11270.

It is an arithmetic number, because the mean of its divisors is an integer number (6159384).

Almost surely, 2^61389255 is an apocalyptic number.

61389255 is a deficient number, since it is larger than the sum of its proper divisors (37160889).

61389255 is a wasteful number, since it uses less digits than its factorization.

61389255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13646.

The product of its digits is 64800, while the sum is 39.

The square root of 61389255 is about 7835.1295458339. The cubic root of 61389255 is about 394.4852666134.

The spelling of 61389255 in words is "sixty-one million, three hundred eighty-nine thousand, two hundred fifty-five".