61655655 has 16 divisors (see below), whose sum is σ = 99204480. Its totient is φ = 32697888.

The previous prime is 61655639. The next prime is 61655707. The reversal of 61655655 is 55655616.

It is not a de Polignac number, because 61655655 - 2⁴ = 61655639 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, 8797 + ... + 14166.

It is an arithmetic number, because the mean of its divisors is an integer number (6200280).

Almost surely, 2^61655655 is an apocalyptic number.

61655655 is a deficient number, since it is larger than the sum of its proper divisors (37548825).

61655655 is a wasteful number, since it uses less digits than its factorization.

61655655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23150.

The product of its digits is 135000, while the sum is 39.

The square root of 61655655 is about 7852.1114994631. Note that the first 3 decimals coincide. The cubic root of 61655655 is about 395.0550689659.

Subtracting from 61655655 its sum of digits (39), we obtain a palindrome (61655616).

The spelling of 61655655 in words is "sixty-one million, six hundred fifty-five thousand, six hundred fifty-five".