61705655 has 16 divisors (see below), whose sum is σ = 83386368. Its totient is φ = 43428000.

The previous prime is 61705639. The next prime is 61705667. The reversal of 61705655 is 55650716.

It is not a de Polignac number, because 61705655 - 2⁴ = 61705639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16391 + ... + 19800.

It is an arithmetic number, because the mean of its divisors is an integer number (5211648).

Almost surely, 2^61705655 is an apocalyptic number.

61705655 is a deficient number, since it is larger than the sum of its proper divisors (21680713).

61705655 is a wasteful number, since it uses less digits than its factorization.

61705655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36238.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 61705655 is about 7855.2947112123. The cubic root of 61705655 is about 395.1618308210.

The spelling of 61705655 in words is "sixty-one million, seven hundred five thousand, six hundred fifty-five".