61655481 has 24 divisors (see below), whose sum is σ = 94708224. Its totient is φ = 38517120.

The previous prime is 61655467. The next prime is 61655501. The reversal of 61655481 is 18455616.

It is not a de Polignac number, because 61655481 - 2⁵ = 61655449 is a prime.

It is a super-2 number, since 2×61655481² = 7602796674682722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61655401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40720 + ... + 42206.

It is an arithmetic number, because the mean of its divisors is an integer number (3946176).

Almost surely, 2^61655481 is an apocalyptic number.

It is an amenable number.

61655481 is a deficient number, since it is larger than the sum of its proper divisors (33052743).

61655481 is a wasteful number, since it uses less digits than its factorization.

61655481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781 (or 1778 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 61655481 is about 7852.1004196330. The cubic root of 61655481 is about 395.0546973339.

The spelling of 61655481 in words is "sixty-one million, six hundred fifty-five thousand, four hundred eighty-one".